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UNITED STATES DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY
INDEX TO K-AR AGE DETERMINATIONS FOR THE STATE OF OREGON
By
Robin B. Fiebelkorn, George W. Walker, Norman S. Macleod,
Edwin H. McKee, and James G. Smith
U.S. Geological Survey
Open-File Report 82-596
1982
This report is preliminary
and has not been edited or
reviewed for conformity with
Geological Survey editorial standards
and stratigraphic nomenclature
Table of Contents
Introduction -----------------------------------------------------------Map and sample numbers --------------------------------------------Location ----------------------------------------------------------Geologic unit dl~ rock ~pe ---------------------------------------Potassium-argon age data ------------------------------------------Reported ages -----------------------------------------------------Recalculated ages -------------------------------------------------Selected references -----------------------------------------------Index map ---------------------------------------------------------tabular data -----------------------------------------------------------Selected references
1
1
1
2
2
2
2
3
3
4
35
INDEX TO K-AR AGE DETERMINATIONS FOR THE STATE OF OREGON
By
Robin B. Fiebelkorn. George W. Walker, Norman S. Macleod,
Edwin H. McKee, and James G. Smith
I NTRODUCTI ON
As an adjunct to the preparation of a geologic map of Oregon, all
available potassium-argon age determinations on rocks and minerals from the
state were compiled and are presented in the accompanying table. The age
determinations come from published reports, including earlier summaries of
radiometric ages, unpublished U.S. Geological Survey radiometric ages, and
unpublished ages from non-U.S. Geological Survey investigators. The data are
complete through February 1982. Every effort has been made to obtain all
analytical data and accurate sample locations and to cross reference all
source publications. Age determinations are presented both as they were
originally published in the source references and as recalculated ages using
currently accepted potassium isotopic abundance and decay constants (Steiger
and Jager, 1977).
We strongly recommend that original source reports be carefully checked
before making reference to the reported ages included in this report. This is
especially important because space limitations prevent us from presenting
authors interpretations of their data. In addition, typographic errors as
well as errors of omission are possible in a compilation of this type and
size. If a rearler detects an erTOr" or ami ss i on, we waul d appreci ate bei ng
contacted through: George W. Walker, Branch of Western Mineral Resources, MS
41, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025.
I
Map and sample numbers
The ages are grouped and numbered by county; each map number ldentlfles a
sample location within a county on the index map. Whenever different authors
referred to samples by different numbers, listed multiple determinations on
the same sample, or gave different published versions of the same age, each
age is listed as a subset of the map number, for example: la, lb, Ie.
locatlon
Most sample locations are given in latitude and longitude, to the nearest
0.1 1 (mi nute), and were ploUed on the index map by computer. Where authors
included maps or reported location by section, township, and range (Willamette
Meridian and baseline), the geodetic coordinates of these samples were
determined from the largest scale topographic map available and manually
transferred to the index map. Geodetic coordinates which do not match
cadastral locations given by the same author are footnoted as apprOXimate. If
authors give incomplete cadastral coordinates or vague descriptive sample
location information, an abbreviated location description is listed in place
of latitude and longitude. Although the latter have an assigned county
number, they are not plotted on the index map and are so footnoted. The
reader should refer to the source publlcatlons for any addltlonal locatlon
i nformati on.
Geol ogi calli t alld rock type
Dated samples represent rocks with a broad range of compositions and
textures collected from a wide variety of geologic structures, evolved during
the course of a complex geologic history of diastrophism, intrusion, and
volcanism. Information concerning geologic units and rock type was extracted
from the references and lncluded in the table. The geologic units listed are
those given by the original author and more recent workers, the latter of whom
may have reconsidered formational assignments after evaluating radiometric
data. Wherever possible, some kind of formational name or abbreviated
geologic description is listed in the column titled "Geologic unit". Where
the sample was taken from a body of limited areal extent, such as a volcanic
dome, the geographic name or physical description of that body is given
instead of a geologic unit name. Specific r'ock Ilames are tabulated in the
"Rock type" column.
It should be noted that formational units which were separated in one
area may represent parts of undifferentiated units in another area. Also,
some geologic units may have been assigned new formational names since the
orlglnal publlcatlons were wrltten. Thus, some samples have multiple entries
in the "Geologic unit" column; the most recent assignment is listed first.
For example, several of the widespread ash-flow tuffs formerly incorporated in
the Danforth Formation (Piper and others, 1939) have been separated into the
Devine Canyon, Prater Creek and Rattlesnake Ash-flow Tuffs (Walker, 1979).
These ash-flow tuff units also were assigned by other authors to the
Rattlesnake Formation, part of the Drewsey Formation, and the silicic marginal
facies of the Columbia River Group. In all cases, the users of the table
should consult original sources.
Potassium-argon age data
Analytical data ar
per gram 0 ra logenlc
total 40Argon. Factors used to convert the data in source reports into these
units were taken from Dalrymple and Lanphere (1969). Where the authors give
an average of the data for an age determination, the average is listed in
parentheses. If the authors also give multiple measurements of analytical
data, all the measurements are listed below the average value.
Reported ages
Ages are presented in thi s column as they appear in the source
publications. Most of the ages from references published prior to 1978 were
calculated with abundance and decay constants different from those currently
in use. Where the ages have been calculated with different sets of constants
by various authors, all of the versions of tile reported ages were listed in an
effort to resolve duplication. The reader should refer to the specific
reference for the set of constants used by that author.
Recalculated ages
Thl s column 1i sts ages cal cal ated from the analyt ical data givell ill the
publications, u~!ng currently accepted_t8un~ince and.decay cons:f8 ts _l.
( K/Ktotal = 1.167x10 mol/mol, AS= 4.962x10 yr , A€+ A€= O.581xlO yr ,
s~~rce
2
•
Steiger and Jager, 1977). These constants, adopted by the subcommission of
the International Union of Geological Sciences are used today by most isotope
chronology laboratories in the United States and Canada. The recalculated
ages using the new constants are generally older by a few percent than the
originally reported ages determined using the old constants.
The analytical uncertainty listed in this co1uI11n was adjusted to
correspond with the recalculated ages by the percent difference between the
reported and recalculated age. As the percent difference is usually very
small, the analytical uncertainty is generally the same as the one given by
the original author.
We have tried to trace and correct all typographical and other errors and
remove ambiguities found in the references which caused the recalculated ages
to differ from the reported ages by more than an arbitrary cutoff of 5
percent. Recalculated ages which deviate more than 5 percent from the ages
reported in source publications are footnoted. Some of the age determinations
were reported to be spurious in the references and are also footnoted. No
other attempts have been made to evaluate the data and users are once again
remlnded to consult the original references for interpretation of the data.
Selected references
All known publications that include K-Ar age determinations are listed
and cross referenced in this column. The publications are abbreviated in
standard form and in order of earliest publication date. A complete
bibliography is given at the end of the tabular data.
Index map
The general distribution and location of dated rocks are shown on an
index map at a scale of 1:1,000,000. The four age ranges symbolized on the
map are: • Present through the Pliocene epoch (O-<5 million year's (m.y.)
ago), A Miocene epoch (5-<24 m.y. ago), • Paleogene/early Cenozoic period
(24-<63 m.y. ago), and. pre-Cenozoic (63+ m.y. ago).
These age intervals were chosen so that most units representing major
events in the geologic record of Oregon would be placed in the same age
group. For example, the extrusive events represented in the stratigraphic
recor d by the extensive ash-flow tuffs of southeast Oregon, i ncludi n9 the
Devine Canyon, Prater Creek and Rattlesnake Ash-flow Tuffs, fall within the
Miocene (5-<2 4 m.y. ago) age interval, as do the vast outpourings of flood
basalt of the Columbia River Basalt Group; the John Day and Clarno Formations
of northcentral Oregon occur within the early Cenozoic range (24-<63 m.y.
ago); the pre-Cenozoic (63+ million years) rocks of the Blue Mountains of
northeastern Oregon and of the Klamath Mountains of southwestern Oregon,
including their respective intrusive episodes, are grouped together.
3
Sample
latitu(le
longitude
UlIber
ntlnber
(N)
(W)
:}
Geologicl unit!. or
Igeogrdphi~ 1<Xia. ity
weighl
I datdd
percent
age
40Arrad
(~06 yr)
(106 yr)
95t3 b
References
I
Tuff
1agiloclase
(0.925)
(I.995)
BI
4.5±0.4
14.9±0.
Walke and othe 5, 1974;
lau sen and
"",ond, 1978
oloy l10u laiol breccia
Rhyol it
'lagiloelaso
(1.296)
(2.747)
74
4.3±0.4
14.7±0.
Wlllke~ and othe=, 1974;
Bro ks and others, 1976;
lau sen and
ond, 1978
118"08.5'
qlnner Cre~k(?
wolded I ff
Tuff
lagfloclase
(1.837)
(3.485 )
73
4.ltO• 4
13.1tO,'a
wtllaukejand
othiS,
1974;
sen and
llIlIond, 1978
118"05.3
B~ld 110 un I
tlabbro
(0.249)
0.242
0.252
0.253
(5.953)
6.042
5.864
(40)
35
45
155 t 5
(0.552)
0.552
0.551
(7.543)
7.483
7.604
(11.870)
11.558
12.183
151.591
(58 )
39
77
83
140±4
144±4
00.
131t4
134±4 b
00.,
7.531
157.972
136±4
140±4
00.,
8.302
1.241
161.542
16.779
93
81
128±4
125±4
130t4b
92t3al,h
00
74
122t4
123±4b
110.,
118±4
12CJt4b
00
93t3
95±3 b
00
BR-I-7
4 °34L5'
118 ·12.8'
GWW-68+69
4°34L7 '
117°48.3'
r,wW-22+69
4 °19L7'
YU-WT-165
4°51LI'
in Jalholilh
florntilonde
florntilende
118"09.9
~ld l1ounl~in lIathollth
Quarlz
diorite
{
Biotilte
foUte
WT-745
5°031.4'
117°16.6'
Cprnucoplal st04k,
Craler l~ke trondhj ... ito
TrondhJ"",ite
8a)
8b
WT-818
5°001.3'
117°19.0'
~rnucoPial tonal He
Tonal H
9
WT-753
5°021.4 '
117°25.3'
~edlo
pOi~t
quartz diad
Quartz
diorite
iotHe
8.278
152.171
fotflte
8.15
146.0
,,"scoVite
7.604
106.654
e.
alhll1th
~~o~te
lende
{ rr
10
WR-987
5°02L 4'
117°14.1'
Cprnucoplal st04k,
I Tramway fron<!hj ...i 10
TrondhJ"",fte
11
WR-988
5°02L2'
H7°H. 5'
C rnucopial sto¢k,
Pegmatite
~nol ithfel bre(da
Rhyol it
clasl
{ "lagloclaso
iotito
(7.73 )
7.73
7.73
la9 oelase
laglOclaso
(0.872)
(0.950)
Plag oclase
(0.468)
84
t
raWerck' 1962
lau sen and H
159±5
ond, 1974
A nst ong and others, 1976,
Lau sen and
RIJIond. 1978
00
Pine lak~ t""ndhj ...it
liarntilende
2a}
age
nner CrO~k(?
welded I ff
Wall owa Ba~hollth
4°52L2'
(moles/gm)
Cal eulale
Percent
iotilto
117"06.0'
Wallo"a
.$:>
Rock 1)1'0
!'ale1 ial
Trond hj ~n ite
5"02,7'
YU-WT-35
Reportod
k 20
location
Map
U8-2-70k
4·311.0'
118°10.0'
2b
13
70USGS(O) ,
72FP69
4°48.0'
117°19.0'
Diorite
4a)
4b
5-9
4·211.0'
H8°1 B. 0'
Oacite
15
U-4
4"25.0'
118°15.0'
SR65-1I5
4"311.5 '
1I!3°34.3'
KAI205
5°08.4 '
1~2°32. 5'
42,
R0719
5°1~.4'
1~1°4 7.6'
\butmont,
Whi ted 'lesevoir
Oad te
{
~
(0.446)
0.446
0.447
(0.520)
0.520
0.519
1.265
26.69
9.1±8
19.6±8
1.468
39.9
9.0to. 6
19.5±0.~
96
21 8 t 5
2.50
2.48
80.81
80.74
9.8±0.38
8. Ito. 50
19.8tO.4
18. Ito. 51
1.30
57.39
9.lt O• 65
19.1±0.7
8rook~ and othljrs, 1976;
G.
257.7
218t5
II.
Wanor
1unpub. data
Do
~rvf~ and Col~, 1978
~yn 1977
00
00
Benton r'\>unty
Pogmatito
,",rn~lende
olalla FdnnaUon
Tuff
Plagioclase
till Creek intrusion
Diori tE
IWhol
'lary's Pealk sill
(0.696)
0.698
0.695
9.7
3.08
30.5tl.12
1
010 and F.naVel Y, 1969;
la u sen and "",ond, 1974
P. • Snavel • unpub. data
15
1 ackamas ICounty
27
0.189
[~erJen
1964;
lau sen and
and Jlmes.
CImIond.
1974.
0.8
Wal er and
e rock
2.14
3.65
1.6tl. 2
1I.8tl.~b
hers. 1974
1969;
Bik noan, 190;
lau sen and
ootooles at e~d of labular Idata
0
~ise,
CImIond. 1974
---I-------~-_+
--I
Mall'
sample
I
~ocat ion
1--+-------+----------+
Ktl
40Arrad
-l---- 4--+---+ --I
ter'.l
Latltud
~~~~
<1a_t..':
age
(
0 6 yr)
age
6
(10
yr)
I
Breeci a
I
Hornbl ende
0.35
0.350
T±2
1±2
Ijhnl el rock
1.20
1.025
5.8;tO.8
5.9;t018
'<>1
33.
R0724
45f25. "
1211°48.1 •
12.
45f21.
1211°51.1 '
Tab fI ow.
Iorseshoel Rid~e
01 iVine-laugite
andesi te
IIholel rock
I. 45
1.115
5. 5;tO. 7
5.6±Ol7
45f23. ,',
1211°43.9'
Sa holy Glacil". Volcano
Pyroxen~
\jhol el rock
1.62
0.775
3.2tO.3
3.3;tOl3
~rnb'ende
0.31
0.3885
B.4;tO.6
8.6;tOl6
97.
R0723
"Y.U
liQzag Mountain IAndesite
Ito 509
~~)
M.B. 1-6
lIyperst~ene
Quartz
45fI7.'l'
1211°46.2'
T. 3. S., R.18E.
~rnb~erK1e
diOrlJe
L.aurel IJilll 1'1 uton
Quartz
diari e
Oi ~e
Aodesite
13.6
0.29
0.3379
11.3
8.0;tO.6
8.I;tO 6
hal el rock
1.386
1.025
80.0
5.0-1.0
5.0-Kl.5
5.lt11.0 0
45 ~08.
12/l032.5'
Molalla Forl.atton
Tuff
'1 aglbclase
0.152
0.349
35
12.9±1.0
15.9±1I.oa
DKA-1175
45~8.J111
12a '3 2.5'
Molalla Forinat ion
Tuff
lagibclase
0.184
0.400
65
12.2±0.6
15.0td.7 a
44f55.'"
12
OMS-23-1
12
OMS-23-4
12a'12.0'
12
OMS-23-3
12
OMS-23-2
"'horn Fonn~tio
18i 9 81 ac~'1 fl ow
{i~gf~~~t
Andesitl
porphj(ry
Refe~ences
I
o
OMS-18
45~03.33
OMS-21
45ro4.
12a028.9 '
As.urned ColllJnbq River
~rOCk
mesh
Basalt
asalt eduivatents
•
rock
hal
0/60
ol! et
fuol
0/60
hed
rock
mesh
hal
8/3
rock
mesh
12a022.l o
Salrdine Lavlas
Andesit
hal
e rock
12a021.7 '
Salrd I ne Lavla s
Andesit
hal
e rock
"hal
rock
\lbOl
rock
rock
15a '(
2.931
39.3
115.28t O.1
15.7±il.2
o
2.868
53.9
5. 25±0. 2
15. 5tOI. 2
o
2.824
49.5
115.06±0.6
15.5±O.6
o
(1.132)
1.140
1.124
2.893
25.8
7.22±0.2
17.7±O.2
n
(1.420)
1.424
1.416
3.256
19.0
5.45±0.5
15.7±0.5
o
(l.ll6)
1.120
I.ll2
(1.048)
1.048
1.048
2.547
55.0
5.38±0.1
15.8tO.2
o
2.l71
37.3
5. 27;tO. 2
15. 6tO. 2
o
2.95R
47.2
5.03±0.2
15.4tO.2
n
hal
441°53.' ,
122°13.2'
R~odoolendr1n
Fo~a t i on.
welded I' roel stic flts
Andesit
lag oclase
1ag ocl ase
12.5±0.4
12.0;tO.4
441°59•• ,
122'08.9 0
Andes I t
lag oclase
1ag oel ase
1l.9±0.3
11. 5;tO. 3
11
17
I'EII-77-.,.
FRL-4822
18
18
PEII-77 -~.
FRL-4821
atlon.
(1.326 )
1.336
1. 317
Hamnpnd and glthers, 1980
~t:
Evanls and 8r~wn. 1981
unt Hood GraulI'
holol rock
2.28
3.9B3
90
12.2±1.7
12.2±1.7
121 '52.0'
Mount Hao<11 Gro~r'
Iholll rock
0.965
1.495
6R
10. 7;tO. 5
10.7td.5
llo.
121 '48.2'
Mount
~ood
,/hol' rnck
0.%6
1.469
64
In. 6;tO. 5
10.6±0.5
llo.
MII-20/
Ut- 228
451°23.' ,
121 °52.0'
LCM/
UT-240
45°23."1
1111-10/
UT-227
45°23 •• ,
Footnotes at end of tabullar d~ta
ododendr n Fo
tephra b <1
]
o
Sutter. 1978
19.2±01.6
Andesit
451°02.' ,
{
o
o
8. 73tO. 6
Sardine La;!as
llMS-22
0
00.
15.9
12a'29.4 '
12/1'23.7
Iwalktr and ot~ers. 1914;
La rsen and IHaooond. 197
3.526
Andes; t,
441°57.
o
(1.268)
1.276
1.259
(1.296)
1.29B
1.294
(1.278)
1.259
/.216
(1.264 )
1.274
1.254
Salrdine L.a;!as
OMS-24
ikomnan.197
La~rsen and IlIaooond. 197
lL.aur!;en and 1I~lMIond. 1978
16.5t1.0
13.5tO.5
13.3t1. 6
13.0tO.7
lagi close
hole rock
'I,ol~
45 ~OO.
(Jl
I
I
andesllte
DKA-1174
m}
I
I
andesilte
Ito 512
lti
I
Percent
40 Arra <1
Cal culat'd
lacl amas Cou ty--Cont.
For/lnation.
l~d~~itel:l as
n brecci
R0722
15~ r
x I~ll
(moles/gm)
Repcrte<1
'To'"1
A0726
7d
percent
r
-:it----Ibrnble~-~t;;~ndror.
"i"'
weight
I
IGrol'p
1
-------+--~I---i--I-I--IMdfl
nl'llfer_
Sample
L.tl tUdd
Longlitude
-1-----1--1
t~aterl.1
ieolOY1c lJIIH lor
~~ __ ~_~~1
ntJnber
K [J
2
weight
~~Arrad
1---
Roported
Caleul.ted
x lOll
1,lerce_n_t_ _ (mOles/ ym)
I ae~ty- -Cant.
van~ .nd Bro*,. 1981
22
LCM/
AH-48
45'23.8"
1211"49.8'
I'I:>"nt llood urou
Ilhol e Irock
0.965
1.460
~2
0.5±0.4
10.5±OJ4
23
MH-19/
AH-47
45'23.7"
1211°52.0'
MOlmt Hood (irou
\jhol el rock
0.945
1.100
95
9.5±2.4
9.5±2J4
00.
24
OMF-711-3i50/
UT-224
45l23.8
1211°48.4 •
Mount Hanoi liroul
H"rnblende
0.230
0.109
85
.30±0.87
9.30±OJ87
00.
25a~
17774
45'12.0"
1221°13.3'
Co) ...hi. Rifer
~salt Gr up.
r.nde Ro de a.salt
Bas.1 t
Who I e I rock
( Whol e rock
1.822
1.683
4.144
3.636
31.5
30.7
15.7-1()j6
14.9!0 6
26
17765
45'01.01'
1221°44.0'
Col umbia RiEr
asalt Gr up.
,rande Ro e a.sal t
Bas.1 t
Whol el rock
I. 382
2.955
42.1
14.8±OJ4 d
KA2134
45'55.0"
123~58.0 '
Ya~ im.-type I B.S~lt.
Bas.lt
1
,
25bll
• R.I Lux, in Iprep.
Oc
lld.
l.t sop CiJunty
11 agibcl.se
(0.386)
0.796B5
(I.54 )
1.54
1.54
3.634
4.9
4.0±2.7
14.3±2l8
urn~r. 1970;
So vely .ndlothers, 1973;
La rsen and HilllIIlond. 19741;
Walker .nd thers, 1974
25
5.9±0.3
16.3±ol3
lem I.nd Cres$y, 1973;
L.Ursen .nd IHal'l1lond , 197E
79
147±4
150±4
ol"".n and L1nPhere. 1971;
Laursen and H_ond. 19741
1.671
38
145±8
148±8
(0.625)
0.62
0.63
(3.65)
3.63
3.67
0.335
59
3.6±O.6
3. 7±OJ 6
1.93
71
3.6±0.2
3.7±Ol2
e poe Bay Ba sal t
YU-EI
45456.0"
123~59.0'
Ee~l.
St. Park s111
B.s.lt
Wholel rock
Coos Cotlnty
::~
94-97
43407.0"
124~25.8'
Schi st
{
~henglte
~1.ueiJphane
(10.46)
10.47
10.46
(0.075)
0.077
0.073
236.0
lld.
0'1
Crook County
la
Ib
I)
GWW-121-!j4
43'47.8"
IIsh-flo,j tuff
1201°22.8 '
{
~I aglbel.se
GI.ss
RCG-61-1~65
43'48.1"
120~01.2'
Ash-flowl tuff
II k.1
felUpar
(6.76)
9.298
92
~.29±0.23
9.53±0124
;reeie .nd ot~ers. 1972;
Wa ker, 197 ;
Walker.nd thers, 1974;
L. rsen .nd H_ond. 19lE
RCG-102-66
43'58.8"
119~54.1
B.salt
holel rock
(0.306)
0.268
16
.92±0.41
6.07±0142
;ree~e .nd otters. 1972;
Wa ker and thers, 1974;
L. rsen .nd HiIII11lond. 197E
RCG-106-~65
43'48.0"
120~00.6 '
Ash-flowl tuff
,I k.1
(6.90)
9.252
88
~.05±0.281
9.2g±0129
.Ik!r. 1974;
W. ker .nd tthers, 1974;
L. rsen .nd Hanmond. 197E
vans and Brown, 1981
'
fel~spar
OOl}ll-Ba~I­
4Hll.6
Pb-5/
IIH-34
1211°03.1 '
Powell Buttes
holel rock
1.181
5.153
41
/l.I±I.1
30.I±HI
44,.1.01'
1211%
.2'
Po~ll 8uttes
northoc1 ase
5.29
21. 718
32
8.1±1.0
28.1±1l0
Pb-I/
UT-216
44'14.5"
1211°03.1 '
Po~ll Buttes
I agibelase
0.151
0.192
91
~.83±1.3
Pb-2/
UT-210
44115.71'
1211°04.8 '
Po!'" 11 3uttes
lihol el rock
0.355
0.305
96
.96t2• O,
5.96±2l08
0,
1I0Gi'lI-Bai81I/UT-226
4H09. cl '
1211°03.1 '
Poj.ell Buttes
lihoI el roc k
0.640
0.141
97
• 5HO. 771
I. 53±Ol 77
o
648-628
44115.41'
120°32.8 '
Clarno Fonnatio
"1 ag Ihcl.se
0.264
2.071
23.1'
2/UT-225
8
101
al k~r. 1970'11974;
W.l ker.nd thers, 1974;
La rsen .nd H....ond. 197E
IJc
"
Footnotes .t end lof tabul.\r d.lt.
8. 83±1l 36
53.7±1l0
• TJ Robinso~ and Eo H. MeIKee.
unDub. data
L at ion
Map
Sample
nu"b r
nURber
Lati lIde
(N
Longi ude
(W
G ologic u it
ge/9raphic
r
ocality
Materi 1
Rock type
d ted
K20
40J\rrad'
f,.,iqht
x 1011
ercent
ge
age
moles/gm)
°Arrad
(I 6 yr)
(10 6 yr)
ercent
Re orted
Calculate
Refer noes
Croc k County -Cont.
11
648-657
44' 2.8'
120' 1.9'
12
648-625A
44' 3.2'
120
Low r John 0 y F nnation
13
648-6238
44' 3.2'
120'~7.4'
Jo~
14
648-644C
43' 6.0'
120'b8.0'
Mils all Fonn tio
35-8,
42" 4.3'
124 p8.4'
Sad Ie Itlunt in
Pea Se Peak
7.4'
Joh
r
Oay Fon ati n
Oay Fon ati n,
well But e dim<!
--
1.983
10.7
-
0.317
Welded tu f
Plagio lase
0.396
Rhyol ite
Alkali
feld par
3,58
1.849
21.47
-
n.ltO.
IJo
70.01
-
25,8±O.
00
Welded tu f
Alkali
feld par
3.89
9.17
-
13.8±O.
Do
Oiorite
Hernbl nde
0.223
10.12
6
85t25
291t25
Quartz
diorite
Hernbl nde
1.10
48.00
24
75t20
280t20
IJo
Mafic
Wole ock
D.43
14.42
32
15t5
219t5
Dptt.1965.
Lau sen and ifamnond. 1974
Diorite
Hernbl nde
1.103
25.75
66
155
Iptt.1965.
Koc • 1966;
La u sen and
Wole
0.22
4.95
40
49t4
150H
Iptt.1965.
La u Sen and f1alll1lond. 1974
--
l~tt. 1965.
13,40
7.742
42.9t5.
P T. Robinson and E, H.
unp b. data
Mc'I>e.
Ikrnbl nde
urry Cou ty
1
iorite
A-DOn
2
Qll,
A-ODlO
42' 0.8'
124
3
16-28-5
42' 3.7'
124' 1.3'
Dik
4
C8-14(68)
A-0071
42' 1.6'
124116.5'
Col ier 8utt
5
18-28-7
42' 0.7'
124' 6.4'
IJot an Fonna ion
Andesite
doc ite
ERR-I,
U.A.AKI42.
80321
42' 2.3'
124' 1.0'
Pea se Peak
Quartz
diorite
7
62-173.
R-D074
42" 9.7'
124
Col brook Fonnat on
Schist
I/Iole
8
62-82.
A-D073
42' 4.6'
12420.9'
Oik
9
C-l.
CS-l,
R-DD69
42' 1.4'
12423.3'
lD
Rhg
42' 3.3'
12418.3'
11
RD-62-62
42' 3.6'
12
54-65A •.•
54 -RGC-6OJ
423.3
59-69
42' 4.8
12418.0'
6a
6b
6c
""'-J
0.9'
iorite
di rite
r
ock
-89
46
141t7
145t7
ock
1.922
40.75
46
138tiO
142ttO
Do
Diorite
Hernbl nde
0.097
1.95
29
13Dtt5
135t15
Do
Col""rook Fonnat on
Schist
Wlole
ock
2.22
42.5
44
125t6
128t6
Do
Dik
Rhyolite
Wlole
ock
1.12
5.0
25
lD.Ot1.0
30.7tl.~
12422.8'
Sfl
Mafic
Wole
ock
3.89
16.3
35
28.0tl.0
28.gH.~
12402.1'
81gCra9giesKlipe
Anphibolite
Hernblnde
50
15lt6
154t6
0Iemnandlaphere.1971;
Col ",an. 197 ;
La" sen and !IOmmond. 1974
69
149t4
153t4
Six s River
Schist
olem n and La phere. 1971;
lau sen and IIiommond. 1974
12
132t13
135t13
IJo
72
142t4
145!4
IJo
2.854
34
141t6
144!6
IJo
1.695
37
132t8
135tA
IJo
78
145t4
148±4
00
80
141t4
145t4e
IJo
2.5'
{P engi e
rea
13b
G aucophane
{P engite
14a
14b)
29-69
42' 1.4
12415.2'
Roseburg are
Schist
14c
Altlnolite
G auccphane
15
34-RCG-65
16
47-RCG-64 1
Foo notes a tend
42' 9.1
124109.1'
T 365 •• R. 1 W.
f tabul ar da a
a...ond. 1974
-81.7
74.5
130
}
amnond. 1974
-4.39
3.43
ior te
{8 otit
8iotit
80tit
51
150
0 tt. 1965;
Koc • 1966.
Lau Sen and
(0.145)
0.147
0.143
(9.87)
:::~
(D.025)
0.D25
0.025
(9.68)
9.7D
9.66
(0.132)
0.132
. 0.132
(0.084)
0.086
0.082
Pea se Peak-type diorite
Oiorite
H rnhlende
(0.728)
0.730
0.725
Pe rse Peak type diorite
Diorite
M scmite
(9.36)
9.42
9.30
3.362
226.5
D.5D4
210.5
16.20
202.8
46t4
145t4
125t3a
Koc • 1966;
Lau sen and
amond. 1974
l~tt. 1965.
lau sen and amnond. 1974
Wal er and 0 hers. 1974
00
Location
Sample
Ma
niJul1er
nlJober
Latitude
Longitude
rrologie
(~)
(N
i
Hfterilal
nit rr
gJ,graphic local ity
Relported
, K 0
2
dtec:
Rock typ
Cal cul ate
weight
Percent
age
age
percent
40 Ar rad
(,10 6 yrl
(106 yr)
Reference s
Curry County~ -Cont.
BlotUe
17a
I)
19-RCG-65
42°~
MAR-I-67
42~3.0
1.4
Pe~rse
12H21.7 •
Peak Itypel Diori te
Diorite
{
17b
18
Hornhllende
12lt55.0·
Quartz diorite
tibrnhlende
12or4 7.4'
Basalt
phgioc1 ase
(2.445)
2.45
2.44
(0.453 )
0.456
0.450
(0.228)
57
14114
145
qolem~n. 1972;
9.542
69
13 714
141
IX>
4.967
54.4
52.85
Lauhen and ~antllond, 1978
146t4.14
~. A.I Lanpherel. unpuh. data
alk~
and 5w son, 1969;
Wal er and thers, 1974;
D<lschutes tounty
GWW-123-64
43453.0
I
0.34
(0.331)
26
6.6t2•O
6.7t2JO
(6.65)
(9.306)
75
.45tO.21
9. 70 t0122
een and ot ers. 1972;
Walker, 1974. 1979;
Walker and thers, 1974;
La rsen and Hal1lTlond. 1978
(0.377)
(O.ZI9)
13
3.9t O•4
4.0tOl4
alk~r. 1974;
Walker and thers,1974;
La rsen and Hal1lTlond, 19781
1.1 3 tO'05
Lau sen and Hanmond. 1978
llIW-16-6
FB-I-70
43441.7"
4H37.5"
De. i ne Cany~n
sh-flow tuff
119f54.1'
Ash-flowl tuff
felaspar
Rhyodaci~e
1201"27.6'
PI! kal
~1agioc1ase
M073-31
43t37.5"
1201"53.3 '
Quartz 'buntain Idome
Rhyolitel
~sidlan
(3.835)
3.83
3.84
0.6Z68
36.4
1.10tO•0
M073-29
43t39.91'
lZ01"5 9.6'
Ea't 8utte dome
Rhyol itel
3.84
0.4823
2Z.8
0. 85 t O•0
China Hat dfiae
RhYOllt~
~sld~ an
M3-53
43t40. d'
IZII"03.0'
I~~)j
00.
3.69
0.4Z764
7.2
O. 78to. Z
O.80to 21
0.944
(0.6656)
0.669
0.6622
(6.75 )
5.3
8.2
4.8tO.4
4.9t .4
Armstron9 andlothers, 1975
La rsen and HalllTlond, 197
(9.85)
9.7
10.0
3.3t O• 2
3.3tO.2
00.
0.88t O•0
0.90td.05
o
0.5t O• 9
0. 83 tl.5 a
r
0.4to.4
0.4td·4
00.
la.
H8-7
44f12.
121"24.5 '
5-84
44fI9."'
12]"31.0'
8asalti
andesIte
hal
e rock
1.027
(0.4947)
TfJ-363
44f23.
121"46.0 '
Basalt i
andesite
hoi
e rock
1.110
(0.1432)
0.1468
0.1397
(13.1 )
13.8
12.4
B-4
441°08.' ,
121°22.6 '
Oacite,
ash- flow
tuff
hal e rock
3.45
0.4119
0.7
8T-31
441°10.' ,
121 °36.1'
MelYin Butte pl~9 d(J'e
Oacite
(3.705)
3.66
3.75
0.ZZ89
8T-72
441009.
121°34.0 '
Three CreeK Butlte pi ug dlome
Oaci te
holt rock
3.44
0.0821
0.2
0.2t O• 9
0.2tp
M3-99
43°49.· ,
121001.1'
North of China IHat
Rhyodacite,
ash-flow
tuff
lag ocl ase
0.501
0.05478
0.05
O. 7to. 7
O.
M-4-16
43°43." ,
121°ZI.6 '
East McKay I But~e dome
Rhyol it
Whol
e rock
t
ICbsl~ian
4.01
0.3442
0.906759
12
10.Z
8.45
M-4-72
43°48.p,
IZO"47.0'
pi ne Mounta i n
Rhyod aclite
Hornbl ende
0.285
M-6-4
43"55.
12~
HOrse Rldg
8asalt
Whol e rock
0.992
1.08962
64.5
0.78Z
3.85
0.8315
3.4870
3.3
1.2
5anf~jne
43 "40.~'
1~1"03.0 '
China Hat dOOle
Cbsidial
Whol
101-6-58
43°42.17 •
1~1"24.1
Niawberry V~lca~o
Ash-fl.<lw
PI agli oc 1a se
0.311
0.234070
9
M-5-41
20
M-5-21
4t"03j8 '
4 °38 6'
11
0'87t~005
hoi el rock
c\.,sldlian
MO-73-2
I
'
alk~' 1974;
Ou.
co
17
1
Ma Leod and,otherS, 1975;
Me e and 0 hers, 1976;
La rsen and HaDlTlOnd, 19H
Basalt ic
andesilte
"00.8'
t
e rock
0.5 8t O• 11l
7t~. 7
O·60tO.IO
22.0!'
t
7.61 !.08
7.41 .8
Maseod and ithers, 1975;
Kee and thers, 1976;
L ursen an HalllTlond. 1971
In.
N. ~. MacLe04 and E. H. MqKee,
U1'puh. dat
",.
6.3t .1
'0.
'0.
0.92
5.Z2t .OZ
~.
pUlfllde
Fdotnotes at en~ of tabul ar data
ql"21.6'
Bend ash- til ow tuff
Ash-fl <jw tuff
PI aglioel ase
0.768
0.440525
3.85
3. 98t~. 9
o.
dl041.Z'
Eaton Butt~
Rhyodadfte
PI aglioc1ase
0.325
0.1725ZZ
1.10
3. 68tl3.3
bo.
I
location
Ma
nun er
Sample
lati1tude
long tude
n""ber
( )
[~)
nit or
le°logic
g ographic loca lity
KtJ
40Arrad
M ter al
weight
x 1011
at",
percent
Rock typ
(moles/gm)
R ported
Calculat ~
Percent
age
age
40Arrad
( 0 6 yr)
(10 6 yr
Refer ~nces
lesch Jtes Coun y--Cont.
21
M-5-25
43 41.2
121 15.6 '
Ne iberry Vo
c~no
Rhyol ite
P agi clase
0.50
0.226224
1.06
-
3.14!3 0
22
M-6-23
43 44.8
121 12.8 '
Ne iberry Vo eano
Obsidian
P a9i clase
(0.604)
0.608
0.600
0.2407012
9.7
-
2.8tO 4
23
M-6-47
43 38.8
121 01.2 '
Ne iberry Vo eana
Ash-flow
P agl elase
0.325
0.128935
64.5
-
2.75tO 49
DJ.
24
80-2
44 10.0'
121 32.0'
Be d tephra set
Pumice
P a91 c1 ase
0.303
0.1126
2.6t2.2
D, •
25
M-5-40
44 03.7
121 21.5 '
Be
26
M-5-18
43 55.8'
121 24.7'
Be ham dome
27
M-6-45
44 104.7
121 33.2 '
Be rwallow
Rhyodaci e
P a91 c1 ase
0.590
0.138427
2.03
28
M-6-64
43 41.4'
121 19.0'
Ne iberry Vo eana
Rhyolite
P a9i clase
0.818
0.11l510
29
M-6-31
43 41.0
121 14.3 '
Ne iberry Vo eano
Rhyol i te
-
3.94
id
ash-fl ..
utte
1.63!l 1
DJ.
0.95to 2
o•
0.459403
5.06
-
O.80tO 23
Ill.
-
0.74to 12
D•
P a91 clase
0.709
0.255426
1.52
--
P tas ium
fel spar
0.986
0.2488
3.25
M-6-44
43 42.2
121 23.3'
Ne iberry Vo can
--
P a91 clase
1.201
0.127209
10.96
M-9-12
43 ~9.4
121 00.9'
Ne !berry Vo eano
Ash-flow
P a9i clase
0.277
0.0198104
1.03
32
M-6-80
43 ~3.1
121 09.6'
Ne iberry Vo can<
Obsidian
~ ole rock
4.00
0.27051
9.59
33
M-6-5
43 ~9.2
121 !'z0.7 '
140 iberry Vo eano
Obsidian
Wole rock
3.87
0.227196
6.96
34
M-6-67
43 ~1.4
121 19.0'
Ne iberry Vo eano
Rhyol ite
F Ids ar
3.36
0.195582
1.45
35
N-1075
43 44.9
121 1'09.1 '
He iberry Vo cano;
rill cor
8asalt
Wole rock
0.586
0.030430
0.21
36
N-630
43 44.9
121 1'09.1 '
Ne iberry Vo can
rill cor
Basalt
~ ole rock
2.024
0.0738245
37
M-6-76
43 42.1'
121 09.8'
Ne iberry Vo can
ObsIdian
~ ole rock
3.46
38
M-6-36
43 44.2
121 13.8'
Ne !berry Vo can<
--
R yol te
3.64
39
M-6-97
43 45.1'
121 10.7'
Ne iberry Vo can,
Obsidian
Wole rock
40
M-6-109
43 45.6
121 26.5 '
He iberry Vo eano
Basalt
41
MO-13-30
43 37.5'
120 53.3'
Qu rtz Moun ain
Obsidian
E. H. HcK e.
DJ.
6.17
Ash-flow
30
i
~nd
-
2.24
31
\J:)
• S. Macleod
un~ ub. data
2.50t2 0
00.
1.8to 8
o•
O.50tO 25
Ill.
0.47to 06
a•
0.41tO 08
Ill.
0.40t0 15
a•
-
0. 36tO 25
Ill.
4.89
-
0.25to 09
0<.
0.10023
8.40
-
0.20t0 03
0<.
0.063103
4.69
-
0.12tO 01
11(.
4.02
0.0413527
0.58
o.
Wole rock
1.157
0.0078064
0.32
~ ole rock
(3.905)
3.91
3.90
0.01709
0.22
-
0.07tO 12
0.05:1'0 01
11<.
0.03to 03
o•
oU9las C unty
la
I}
10-58
43 108.5
123 24.0 '
Ro eburg ar a
Schi st
Ib
auc phane
2
IJlS-I33
42 59.0'
122 51.8 '
11 tl e Butt
3bl>
3c
760SJ391
4259.3'
122 55.2'
4
760SJ395
4355.2'
122 52.3'
]a
16OSJ394
42 53.6'
122 50.3'
Fa ",at Ion
16OSJ359
Itlill"
_,I
"111'
42 56.3'
. dh·
, ,lid"
122 033.6 '
(0.274 )
0.276
0.273
0.269
80
148±4
152:1'4
2.288
56
132 t 5
135:1'5
1.009
12.9
233.3
Whole rock
Va canie ra ks fthe
estern C sea e range
Ash-flow
tuff
Slotl e
Va canie ra ks
Basalt
flow
~hole rock
(0.7185)
0.721
0,716
3.259
15.0
--
MafIc
flow
~hole rock
(0.9405)
0.938
0.943
4.008
11i.0
range
Vo canlc r'" ks f the
estern C sea e range
Mafic
flow
~ho1e rock
(0.9145)
0.906
0.9?1
2.900
83.0
fthe
r. sea e range
Vo canlc r'" ks
estern C sea
b
(10.22)
10.27
10.18
(0.113 )
0.113
0.133
Basalt
estern
~
e
en9 te
fthe
P.
(acId treated)
( acId treated)
(acId treated'
{'8.58)
8.58
8.58
(43.59)
43.1i9
43.49
(89.5)
91.0
88.0
2 .83±0.50
25.4:1'0 51
(34.9!J
35.0±1
H.9!!
olen an and l nphere, 1911;
La rsen and Hammond, 1974
DI.
f1eBI ney. 197 •
Su ter. 191
. 6. smith.
n prep.
0
DI.
31. 2t1
Ill.
-
29.4tO 88
IL
-
?1.9:1'O 7
DI.
t---+-+--+-~--+--f--+---~---t--::
----I--
20
Loclat Ion
Mdp I
Ilu~,ber
Sdmpl e
nlJllber
La tit/K!e
Longi~ude
(w)1
(N)
~'a~eria'
f",b I oq ie unlit u
gealJraphie lp.:ality
Rock type
dJted
1
>fIght
Jereent
-hO-
Arrad
11
10
( ole./gm)
Repprted
Calculated
ercent
are
age
OArrad
(101 6 yr)
(10 6 yr)
References
opugl~s County+-Conl.
7a}
7b
7e
8
790SJ034
42'51.2'
122'<14.8'
S79-19
43"38.3 '
123°~1.7 •
Vole~nie rock~ of It he
Western ca s~ade range
Oikel cutting
Silletz Rlvler Vcblcanies
Mafl c f1 0'
PI <lgioell ase
camptooit
Whole rp.:k
(0.249)
0.247
0.248
0.252
1.23
(0.7709)
0.7728
0.7689
9.25
(21.4tO.9
21.4to. 9
21.3tO.9
28.5
36.0
21.0
51.5
80.94
J.I G. $mith, inlprep.
Do.
Do.
p.1
o.
linavely, ~npub. data
l1rant Cou~ty
la}
Ib'
--
6
Johnl Day Formatio
Tuff
Salidi"e
Curti sland others. 1961;
laur~n and HPmmond, 1974
44'2~.0'
119·18.0'
Col u1nbla River Basalt
Basal t
Whcble nock
(0.778)
B
15.4
E.ernd
Gray
Swan
Walk
Laur
nand ot ers, 1964;
and Kitt eman, 1967;
on, 1969;
rand Dt er•• 1974;
en and H Dnd, 1974
KAI206
44"2~.0 '
119°ZI.0'
Ratdesnake flonnat ion
Rhyol ite,
ash- f1 0
tuff
Salidl"e
(4.643 )
84
.4
E"ernd
Swan
Walk
Laur
Enlo
Walk
n and ot ers. 1964
Dn, 1969, DavenpDrt, 1970;
r and at ers, 1974;
en and
mOM, 1974;
• 1976;
r, 1979
CEB-61-75
44 °311.5'
118·42.0 •
Dix ile Cree k area
Quartz
I
diorite
Bibti t
95
45
Rat~lesnake ~h-fIOw Tuff
Ash-flDwtuff
Alkali
eld!par
41.5
.5tO.5 e
Rat~le.nake
A.h-flow Tuff
Ash-flow tuff
Anbrth elase
Rat~lesnake ~h-fllow Tuff
Ash-flDW tuff
Alkali
IfeldSpar
Ignimbri t
Anprthcbclase
(1.344)
1.350
1.336
(3.150)
3.175
3.125
RhyDl ite,
ash-flo
tuff
Anfort hOela.e
(4.53 )
4.53
4.52
4.306
Basalt
WHole rock
0.596
(1.412)
1.428
1.419
1.410
1.392
E-71-67
Po""l1 treek Roa4cut,
Paul ina Basi
44 ·215.9'
1IB"10.6'
o
KA-147
oatin Sprin~,
Pa lina Basin
KA-155
44°~1.7·
119·31.7'
Mascall Fonn<ltlon
Yu-
44 0~6.6'
119°38.7'
Ra
44·30.9'
119·38.2 '
Picture Gorge Ba,jalt
CottonwooUl)
E-3-65
10
26.7 e
{ 2~.7e
KA1203
KA-I-2
-,
ohn IDay Ba.i
8-8-2( 1)
1eSnake fSh-~lOW Tuff"
nforth F nna~i on,
uble 0 R och
w Ided tuf
3
8.02
(4.612)
4.709
4.51B
175.8
•Bt O•5
{3.975 )
4.025
3.925
29
146t7
Ttlayer and Bro$' 1964;
laur en and
mmDnd, 1978;
Marvin and 0 sDn, 1979
6.0tO•
Ohenobrt, 19711;
EnlQws, 1976
~ven,*,rt, 191(
.BtO.4 e
1~.8tl.4
16.2!l.
Ehl DW~ and O.v~nport. 1971;
Launsen and IjammDnd. 1974
6~42tO.l
~.4to.l
6. 59 t O•
Ehlow
Par
Par
lau
Wal
Enl
Rob
Nie
Wal
(56.1 )
68.0
61.0
48.4
46.9
115.9tO.2
16.4tO.
(38.1 )
39.4
36.8
56
and Da~nport, 1971;
er and
mstrD"9, 1972;
er, 1974'
sen and
mmDnd. 1974,1 197B;
er and 0 hers. 1974;
WS, 1976
and ot ers. 1977;
Is, 1977
er, 1979
~tki
s and BalSi, 1968, 19~4;
Bak i and Wa kins, 1973;
Aak i, 1972. 1974;
Lau sen and ammDnd, 1974J 197B;
Wal er and 0 hers, 1974
II
13-3-2( I)
44"30.3 '
119'137.9'
Picture Gorge Basalt
Basalt
WHol e rock
0.572
(1.350)
1.352
1.34B
(45)
41
42
115.8tO• 3
16.3tO.~
Do
12
1-15-1 (i)
44°31.6'
119137.9'
Picture Gorge BaSalt
Basal t
WilDie Irock
0.525
(1.223 )
1.245
1.214
1.209
(3B.0)
39.3
39.6
35.0
115. 7tO. 3
16.1tO.~
Do
13
l-13-1( 1)
44 o gl.0
119j38.3 '
Picfure Gorgf Batalt
Basalt
Wllol e Irock
0.465
1.08
35.2
115.6tO•4
16.1tO.~
Do
Basalt
~ole Irock
0.761
(1.684 )
1.696
1.673
(61.4)
62.0
60.B
4. 9to. 3
15.3to.13
Do
14
14-2-1(1)
44·g0.3
Foo~notes at end bf tabular data
119t37. 9'
Pi clture Garde Ba a 1t
--I
Map
Salnple
nUllber
nlint er
Latltudt!
(~)
I
1------+-----
1---.--+--1---1----
ocat ion
Lonqitude
jW)
K20
I,,,,olog;c lunitlor
g~ograp"iq loc~llty
11ate1la'
dat~
Rock tylle
weight
percent
40
Arra~
• 1011
I---~--+----+------J---+------t-t---t---+-I ~eporte<! I
Caleulati'<!
I I
I
I
Percent
age
age
(lnoles/9m)
40Arrad
(1 10 6 yr)
(10 6 yrl)
Refetences
Grant CountV--Cont.
f}
{*
Ol~ rock
(0.792)
0.790
0.793
(1.728)
I_ 785
(1.709)
1.731
I. 700
1.696
(50.5)
58.6
(47.8)
56.4
52.8
34.3
(114.1:!;O. 3)1
14.9
14.5
(15.1:!;0~3)
rock.
rock
~hOl~ rock
'!lhol d rock
(0_541)
0.566
( 1.180)
(I. 248)
1.250
1.245
(1.180)
1.182
1.178
(1.113)
1.124
1.102
(56.4 )
(59.0)
65.0
52.9
(65.2 )
65.8
64.6
(45)
59.9
30.0
14.7:!;0.2 )1
14.8
(15.1:!;0~2 )
(5.326)
5.314
5.338
5.338
(5.181 )
29
nortlhoc1a se
(4.626)
4.638
4.614
4.395
Rhyollt
lagiloe]ase
(0.525)
(0.948)
116°55.0'
Daei te
lag110c1ase
(1.357)
116°44.0 '
Cbsidla
it assl
(3.417)
15
15
15
5-11
5-11-2( 1
5-11-2
16
16'
4-12-1
4-12 (11I}
16
4-12-1( i,)
16
4-12-2( 110
g~}
Vu-E-B4-67
44r19.
119"30.0'
Ra~lesnakJ Ashtflow Tuft;
anforth Fonn~t lon,
uble 0 Rane
elde<! t ff
Rhyol it~,
ash-flow
tuff
","ortlhoc1a se
~~~}
Yu-E-6-7'
44r46." ,
119"27.9'
Ra~leSnak)Astt+flOW Tuft;
Rhyol it~,
aSh-f1Iow
tuff
GlW-16-6
44~00.'"
116°50.5 '
Strawberry IVolel,"lcs
TlR 75-3
44rI9." ,
V-23
44rlO.
gl}
44~31. ",
44r31.
119"38.3 '
119°38.3 '
Pi~ture
Gorjge Rhal t
Pl~ture Gor1Je Bhalt
anforth onn~t;on,
uble 0 Rane
elde<! t ff
Basalt
aasal t
01
hoI
{
~hol
e rock
0.543
~hol
e rock
0.513
15.6
14.9
~atk!ns
Ba s1
and ~kSi' 1968, 1974;
and W tklns, 1973;
sf, 1972 1974;
La rsen and Hamond, 197~, 1978;
Wa ker and thers, 1974
Sa
o
15.3
o
14.6
15.0
~.
14.6
15.0
~.
6.6tO.2
6. 56tO. 226
6.74:!;n~2
28
6.4ItO•2
6.4:!;O.2
49
5.183
8.58
Park
Wa
En
La
Wa
r and A~stron9' 1972"
ker and thers.1974;
oW>, 197 ;
rsen and Hammond, 197~;
ker, 197
6.59:!;C"l.2
Park
Wa
En
La
r and A1stron9, 1972
ker and thers, 1974;
ow>, 197 ;
r sen and Hamond, 197
12.2:!;0.4
12.5:!;Q.4
Walk r and ot ers, 1974;
La sen and Hamond. 197
62.67
25.7:!;0.5
25.7:!;Q.5
Raby , 1977;
Ro yn and o~hers, 1977;
Hf ols, 197
92.37
17 .3:!;0.3
17.3:!; .36
o
0,
0,
5-12
44r21.
116°39.0 '
Colunbia Rllver aasalt
Basalt
lagiloelase
0.192
0.410
32.24
(1 14 • 9:!;O.8
14.9:!;O.4
23
23 }
3-27
44r20." ,
11$°43.0 '
Sujnmit. Stalwberh Mountain
Mieronotlte
lag lloe la se
(1.833 )
3.282
59.04
(1 12 • 4 :!;0.5
12.4:!;0.4
24
76-1
44r32. '"
119"01.0'
Inhuslon n
eech Cre k Fault lone
Dacite
la9110clase
2.194
51. 84
3.1:!;O.0
25
OX-I
44r32•• ,
11$°35.4'
Cllarno Fo
Basalt
26
B-1
44r3 7.
116°36.0'
Clarno Formatio
Andes it
hoi
KA1230
42r36."'
116°30.0 '
Alltord Creek Fohnat ion
Ba salt
'hol e rock
0.249
69
21.3
Ever
£v
La
Wa
KAI251
42r32.
11$ °35.0'
Steens aasalt
Basalt
hoI e rock
(0.367)
58
14.7
E'ller den and
KAII65
421°44." ,
118°37.8'
~tleens
Basalt
hoI e rock
(1. 6 43)
40
14.5
KAI256
421°12.
11$'21.5'
Trlout
\lhole rock
0.664
51)
13.1
Ba sa lt
hole rock
(J.?8Q )
10
12.1
Rh~~~~~l~w
anidine
(6.992 )
9~.5
1
at 10
0.241
e rock
1.72
1.462
10.31
o
o
12.4:!; .5
12.4:!; .4
0,
3. 1:!;O. 03
11.7
41.7:!;61.0
38.2
41. 2:!;Q. 4
P.
n
Robinso" and E. H. M4Kee,
unpub. data
Db.
Harney C!lUnty
Aa salt
Cree~
ForlT,ation
Rasaltl,!"
den and ","es, 1964;
rnden an others, 196r'
rsen and Hamond, 1971;
ker and thers, 1974
thers, 1964;
Wa ker and eppening, 19$5La rsen and HamRond. 197.;
Wa ker and t hers, 1974
°1
o
tuff
KA1240
431°45.
IIf27.5'
Julntura F0f:atibn
KAI225
431°47.' ,
IIh6.8'
oJ'II ine Can on
Ash- flow Tuff l,
Orewsey onnat ion
Fo<ltnotes at endl of tabullar data
tuff
8.9
Everfden and tt hers, 1964;
La rsen and HaRTlond, 1 C}],
Wa ker am thers, 1974;
Iia ker, 197
j
~~+-~---+---+-~~-----I--ll----1-------I-t-IIK20
Md,)
tAllbe'r
Sa1T11>1 e
LaIH,'de
nllllber
(N)
Lon9itude
(W
Geplogic
u1it
a
geobraPhic 110cal1ty
::}I
43°315.6'
119°)6.5'
Oev11ne (aoyo
42°315.6 '
119°16.5'
Dev ilne Canyo
Ash-flow Tuff
Ash-flow TUff
Rhyal He,
ash- fl a
tuff
9hl
ercent
dated
larn~
GWW-140-61
+i
Materi all
+-
I Renarted
OAr rdd .
10
11
(nole s/!J11)
Calcul ated
ercent
ge
age
OAr rad
(Irl 6 yr)
(10 6 yr)
References
Caunly" -Cont.
6.67
Al tal;
eld~par
Gl ss
5.32
9.B72
56
IO.Ot O• 3
10.3tO.
7.160
36
• lt O• 3
9.3tO•
and Rep~n1n9' 1965;
r. 1974, 1979;
r and at ers. 1974;
en and
mmond, 1978
Wal ker and Repe nlng. 1965;
Gree e and others. 1972;
Gree e. 1972 ;
.7tO.3
Rhyol ile.
ash-fl 0'
tuff
Walker
Walk
Walk
Laur
Laursen and
JlIIIond. 1978;
Walk r. 1979
N
9a
9b
II
11-6( i i)
9c
11-3(0
9d
11-4( i)
ge
11-7( i)
Oa
Ob
Oc
51-2( i)
51-5(i)
51
1
Od
Oe
51-6( i)
51-1(1)
la
Ib
61-6(1)
61
}
Ie
61-l( i i)
2a
2b
17
..,
14-4( i)
2c
2d
17-4(ii)
17-6(i))
42"40.0', .
liB 0~3.0'
Steens Basal
8asalt
Wh~le tack
(1.853)
1. 94
whlol e rock
1.844
WHole rock
1.820
WHol e rock
1.80B
ale ~ack
Wale ock
01 e ack
42°.0.0
118133.0
Ste~ns
8asal
Basalt
{S
~
Ole IrOCk
w:;: :::
42""'0.0
liB t33.0'
St""ns 8asallt
Sa salt
118(330 •
Steens 8asalt
{ W~ol e Irock
Wl'ole rock
6B
..,
6B-6( i)
6B-5( i)
6B-4(;)
6B-I(1)
42140.0"
IIB~33.0'
Steens Basalt
Sa salt
4a
4b
70
70-5( i) ~
70-3( I)
42140.~,
118"33.0'
Steens 8asa!!
Rasalt I
RCG-248-66
RCG-54-51-66
Whole Irock
434 7J·
43P45. d'
431°3 0.·'
118°16.8'
IIS059.9'
119"08.3'
£
(1.572)
1.609
1. 532
1.530
1.576
(1.100)
1.04B
1.187
(1.006)
1.012
Sasalt
3a
3b
3c
3d
3e
W-16
{
01 e rock
Whol e Irack
Whol e rock
42440.0
4cl
Wh~le ~ack
{
{
(74.8)
(76.B)
74.9
78.7
(78.5 )
81. 3
75.7
(64.2 )
59.9
68.4
84.4
(/5.2tO•3 )
~
(30.0)
34.5
25.5
(7.25)
7.26
7.24
(9.826)
9.9890
9.9763
(7.12)
7.10
7.14
9.710
(1.155 )
1.147
1.163
1.338
Ash-fl m\ tuff
$anidline
Plagioclase
5 1
11 •
(55. OJ
(54.4
52.4
56.3
58.5
52.9
1
(2.370)
2.231
2.508
sh-flow-ITuff
15.5
(15.oto. 2)
5.0
(1.076 )
1.004
1.148
Oe~.ine CanYlln
115.1
(15.1tO•3 )
olel rock
ole rock
hoi e rock
Sanldline
15.6
(28.8)
(38.8)
31.7
46.0
(5.3)
(14.6)
Rhyal lte.
ash-fllow
tuff
15.2
(2.454)
(2.358)
2.405
2.312
(2.628)
(2.539)
2.642
2.535
2.726
(2.396)
2.392
2.401
~
15.7
(15.lto. 3 )
15.4
15.1
(2. 241
(2.267
2.258
2.276
2.218
2.213
29.4
6.4
9.3
(15.6 )
24.2
6.9
(81.2)
81.3
81.1
15
(15.6tO.~)
15.3
(45.5)
36.3
(63.5)
42.9
65.1
82.4
7.0
39.4
(1.149)
1.205
1.113
1.205
1.072
rock
rock
(I ~.2tO.2)
(3.474 )
3.682
(3.441)
3.512
3.454
3.356
3.374
3.463
rock
rock
rock
Ole
01 e
hal e
01 e
hal e
Devine can y
sh-flaw uff
Irewsey F nnatioo.
owest nI
er
RhyodacJte
1.000
1.006
(4.193)
(4.413)
4.413
4.413
(4.166)
4.186
4.146
(4.070)
4.106
4.034
4.056
4.9
4.8
5.2
5.0
4.9
4.8
5.5
5.3
5.2
5.0
(i:4.9tO.3)
15.0
14.7
19.15to·1
othe~.
and
1967;
sen and mmond. 1974;
er and a hers. 1974;
ins and aks;, 1974
Do
Do
Do
15.5
(15.3to.~)
00
Do
15.8
15.5
00
15.3
15.2
~I:
~I:
(15.4tO.13 )
15.6
Do,.
15.3
001'
Do.
(l5.4to.12)
15.5
::J:
15.3
15.2
~:
(l5.3tOb)
15.2
15.8
15.6
15.5
~.
(l5.2tO~3 )
~:
15.4
15.1
9.39;tOl19
Dalr pIe and others. 1967"
Wa ker and thers. 1974;
La
sen and Hal1l1lond, 197~;
Wa ker. 197
9. 21t0. 5
9. 45tDl. 51
9.2tO.5
7. 82 t O•2
Enlo and Ila enport, 1971
Gr ene and thers. 1972;
Gr ene. 197 a;
9.2
59
JkSi
Lau
Wal
Wat
Wa ker, 197 • 1979;
Wa ker and thers. 1974;
La rsen and flanlnond. 197
8.03±O.26
It
Gree e and at ers. 1972;
74 ;
Gr ene. 197 a; Walker.
Wa ker and t hers. 1974;
Laursen an
8 wn and
oOlnotes at end of tabuliar dllta
Harrmond. 197 ;
thers. 1980a
i-II·-tKt-
-+-~-~-+--~----j-----i-t----t
Ma
rllJnlJer
Sampl e
nunber
Latiltude
(N)
r
Lon9~tude
(~)
RCG-121-a6
43'W 7.2"
119~18.9'
19
RCG-166-~8
43152.2"
118~55.8
20
RCG-185-~7
43~04.7"
118~23.4 '
'
Steens Basalt
Itar~ey
(0.406)
( 1.167)
5q
9.4±0.8
19.9±oJ8
Ba salt
pP agi0c1ase
0.262
(0.593 )
39
5.3±1.0
15.7±ljO
1.8±5.1
12.0±5 2
8.7±0!3
Ilkal
1181°34.8 '
DrInkwater Sasallt
8asalt
1191°04.2 '
Rattlesnake~ASh,f1ow Tuf~;
Harney FO""~t 1011'
rights Point Member
22
GWW-176-62
4Hoo.6"
118~38.1 '
23
RCG-165-68
43tz4.B"
24
RCG-257 -3-66
43~37.7"
-,
References
n
Dd.
(0.1 5
(0.264 )
7.15
8.976
61
8.5±0.3
Ilaglbc1ase
(0.216)
0.221
18
.91±1.091
7.10±l1l2
Aslt-flo~ tuff
no rt hocla se
(4.93)
4.93
4.93
4.978
31
.B2±0.33
7.00±oJ34
Basalt
hoi el rock
(0.356)
(0.125 )
39
.3B±0.071
2.44±0107
DO.
fel~spar
ouble 0 anc
'elded tu f
25
age
(l06 yr
pP agi0c1ase
Rhyoll tel'
ash- f1 ow
tuff
1191°30.2'
age
d0 6 yr)
Andesite
Devine Cany~n
sh- fl ow tuff
43~54.01'
(moles/9m)
Countv--Cnnt.
II ag i~cl ase
RCG-I62-66
Percent
40 Arrad
t~yPtr---Et--J~:;--~~~~t:~~_t~2-t--~~9==tt==t=:=~==
Basal t
21
-+--+----+---+-----+--+--f----+---+--Roported
Calculated
Arrad
x lOll
percent
].ate
Rock
18
weight
Moterial
'fe0lo9ic nll lor
yJographiC local ity
40
reeje and ot ers. 1972;
Walker and thers, 1974;
La rsen and Itamnond, 19781
~ee
e and ot
Walker. 197
Walker and
La rsen and
ers. 1972;
, 1979;
thers, 1974;
Hammond, 1978
Iree e and at ers. 1972 j,
Walkerand thers.1974;
La rSen and Hamnond, 1978
~ee
e and ot
Gr ene, 197
Walker, 197
Walker and
La rsen and
8r wn and 0
ers, 1972;
a; Hiem, 19741;
, 1979;
thers, 1974.
Itamnond, 19781;
hers, 1980a I
RCG-32-6
43~27.0"
1191°00.5 '
YU-P-l
42106••"
WI OJ 7. 3 ,
Andesit,
'1 agibc!ase
(4.35B)
4.350
4.338
4.386
(71.42)
70.95
71.B9
(87)
92
82
108±1.S
11otU5
arrqld, 1972
Lallrsen and lltamnond, 197!
YU-P-156+l
42fo7.·"
1111°37.8 '
Metaqua~tz
hoi el rock
4.37
66.13
80
100±2.0
102±2l0
1JIl.
7.64
~1.3±1.3
93.7±ll3
o
59. 5±1. 2
61.0±1l2
Du.
8.9±1.4
9.0±i1.4
Park
Wa
Wa
La
8.6±0.2
9.I±rJ.2 a
Park
Pa
Wa
Wa
La
strong, 1972
;
, 1979;
thers, 1974;
Hamnond, 197
8.4±1.3
8.6±l1.3
Park
Wa
Wa
La
strong, 1972
;
thers, 1974;
Hamnond, 197
(53)
59
47
8.2±0.1
8.4±rJ.12
Park
Pa
Wa
Wa
La
strong, 1972
•
, 1979;
thers, 1974;
Hamnond, 197,.
8
7.9±O.9
8.1±rJ.9
Park
Pa
Wa
La
strong, 1972
.
i~ers, 1974;
Hammond, 197
W
dloride
311
YU-P-3
42101."'
118°38.2'
Quartz
monzonite
iotite
YU-P-156
42f07."'
118°37.8'
Aplite
Icroberthiticl (10.46)
microcl ine
10.51
10.40
YU-DP-30
43f03.
11~004.3 '
8asalt
'hoi el rock
YU-DP-3118
43fo9."'
119°22.4 '
Rhyol it~.
ash-now
tuff
YU-oP-14
43~13."'
119°21.2'
Rhyol it,
YU-OP-ll
43~14.· ,
119 °13.5'
Pr~ter
Cree
sh- fl ow ITuff
Pr~ t er Cre~k
sit-flow ITuff
431°03." ,
Fodtnotes at endl of tabul~r dolta
119°03.8 '
(88.5)
93.43
54
(0.415)
0.411
0.419
(0.542)
0.553
0.531
(4.5 )
4
5
hoi el rock
(4.51 )
4.49
4.53
(5.91)
5.62
6.20
'hole rock
(5.13)
5.13
5.13
(6.38)
6.29
6.47
(5.555)
(5.62)
(5.49)
Rh~~~~~l~w
hole rock
(4.56)
4.55
4.58
Basalt
hole rock
(0.352 )
0.34B
0.353
0.354
tuff
YU-oP-25P
105.7
0.4114
(25 )
42
8
(4.5 )
4
5
r and An
ker, 197
ker and
r sen and
strong, 1972
•
thers, 1974.
Hammond, 197
K20
40 Arrad
~terilal
""ight
x 1011
Percent
ated
percent
moles!gm)
40Arrad
Location
M.
m'nOier
Sample
nllTlber
Latitude
(N
Long itude
1'o109;c ~nit rr
(II)
gef>graPhic Iloca Ity
Rock tYt)
Reported
age
(110 6
yr)
Calculate,
age
(10 6 yr)
References
Harn~y Count~--Cont.
35
VU-DP-3161
43°17.0
Rhyol i te
119 '18.8'
36
VU-DP-243
43 °04.9
119 '03.8'
37
VU-DP-330
43°09.0
119'22.4 '
Ra~tlesnake~Ash-rlOW Tuff
Dubie 0 Ranch member.
anforth
38
Vu-oP-311
43 °09.0
119'22.4 •
VU-oP-214
43"1l0.3
119'18.0'
anna ion
Rafol esnake~Ash-rlOW Tuff
o uhle 0 Ranch memher.
anforth orma ion
Rhyol ite
39b
41
VU-OP-160
VU-oP-41
43°16.5
43"20.4
119'(28,0 '
119106.6'
Andesf te
Har~ey Formaltlon
Wrights Poi~t Member
Basalt
(8.216)
8.198
8.233
(57)
59
55
7.lt1.0
7.2tl.p
W~ol e Irock
(4.86)
4.87
4.86
(4.797)
4.659
4.936
(10.5 )
10
11
6.7tO.4
6.8:!;0.
(4.93)
4.93
4.93
(4.853)
4.873
4.833
(23.5 )
26
21
6.6tO.2
6.8tO.12
10
(8.31 )
8.22
8.40
(4.90)
4.91
4.89
7.831
35
6.4±0.2
6.5to.12
~arke~ and Arm~rong, 1972;
4.047
16
5.6to.4
5.7to.14
Whole Irock
L~ole
Irock
43°13.8
Rhyollte
119 tl2.0'
42b
VU-oP-14
43°~6.4
119100.4 '
Ha~ney Format ion
Basalt
16
7.8:!;0.5
Wal er. 1974
Wal er and 0 hers, 1974;
Lau sen and anwnond, 1978
Par er, 1974; Walker, 197~;
Wal er and 0 hers, 1974;
La u sen and
mmond, 1978
(1.892)
2.076
1.707
(7 )
8
6
5.8tO•8
6.2:!;0.~a
Whol e Irock
(0.798)
0.789
(0.32910)
0.31639
0.34182
(8)
2.8±0.2
2.9tO.12
Do,.
2.7±0.4
2.7;to.14
arke~ and Arm~ron9' 1972;
{ ~ole Irock
whol e Irock
(6.47 )
6.45
6.48
(4.46)
4.52
4.41
(0.291)
0.294
0.2B8
2.539
7
1.370
9
2.lto.24
2.lto·124
(0.1136)
0.1821
0.1250
(6)
5
2.6tO.3
2.7:!;0.13
0.BH.2
II.ltl.12
7
Drinkwater Basal
Basalt
Whol e Irock
I 0.487
0.782
45
UO-132 KA
43°45.3
118 t2 5.8'
Orelwsey Fon~at io l,.
01 can ic sand st one
Sandston
1$% Sanidine. I 1.539
81it Pllagfoc1a ..
1.94 7
22
8.5tJ.0
8.7±1.10
46a
46b
PB-2-70
43"28.8
119fJ8.0'
Pallamino Ru~tes dOOle
Rhyodacfte
(1.227)
(7.434 )
31
53
6.5tO•3
6.1to.2
6.7 t O·13
6,2to·2
47
M4-114
43°B8.9
118 t37.3'
8uclhanan doole
Rhyol ite
Sanldlne
7.94
17.36
49.9
14.14tO.50
15.ltO.15
:~~ I)
M3-B8
43°~2. 5
119t52.2'
Wa~ontire HQuntalfn dOOle
Rhyol ite
Plagidc1ase
0.584
1.274
29.1
t
{1!.71
I.IO
I .70H.I0
15.ltl.ll
49
1014-117
42°06.8
119
IlaWkes Valley dOOle
Rhyol ite
SOnidine
7.26
14.541
64.9
1 • 48to· 23
13.9tO.12
10.6to.15
r '.55iO.IO
(1.27)
(8.27)
t
Par er, 1974;
118117.6 •
p\a g l<!c1,se
{ 8 oti~e
'arke and Arm~trOng, 1972;
Wal er and 0 hers, 1974;
Lau sen and ammond, 1978
9
6
43°47.2
50'
SOb1)
101073-43
42°~5. 5
119tI8.8'
Beatys But to> don
Rhyol ite
Ohsidlan
4.81
7.386
37.0
I .37tO.53
{ I .36tO.53
5la 1\
Sib J
1013-79
43 ~34.1
119r08.2 '
Burlns Butte IdOOle
Rhyolite
Ohsidlan
5.43
1i.065
72. ?
l ,. 54 tO.10
7.7410.110
52a~
52h
10\3-86
43~22.11'·
119r51. 0'
E91 1 Ri dge ~one
Rhyolite
rbsidlan
4.93
4.672
44.9
.42tO.19
.41t0.19
( {
6.5 7tO.119
Foo notes at end lof tahul ar data
1972;
(2.13)
2.16
2.10
UO-129 KJl
~2c
~arkeland
Armltron9,
Par er, 1974
Wal er, 1974 1979:
Wal er and 0 hers, 1974;
Lau Sen and amond, 1978
44
to 7. 5 ,
Do
Whol e Irock
Blotl ~e
VU-oP-158
43
(7.86)
7.87
7.84
0.806
42a
~
San id ilne
[Bl ot Hle
Rhyol ite
~arkei and Armttron9, 1972:
5.713
ash-fl~w
Rhyolite
ash-fl ~w
tuff
8.0:!;0.~
(4.92)
4.98
4.86
Irock
tuff
393'
40
W~ol e
.4
Wal er and 0 hers, 1974:
Lau sen and
mmond, 1978
arke
Par
Wal
Lau
Wal
Bro
and Ann trang. 1972i
er, 1974;
er and 0 hers, 1974;
sen and ammond, 1978
er, 1979;
and ot ers, 1980h
aurs n and H ond, 1974
L.
Kltt! an, unpuh. dilta
Do.
alkef:
Wal er1974;
and thers, 1974;
Lau sen andlHammond. 1978
aeLe
and others, 1975:
McK e and 0 hers, 1976;
Lau sen and Hammond, 1978
Dol'
Do.
fo\cK~
aeLe
001'
and others, 1975;
and others; 1976:
la u sen and Hammond, 1978
Wal er, 1971
aele
and otlhers, 1975:
fo\cK e ano others, 197/i:
La u sen and Halllll1ond, 1978
~:
rJ.
-~
Map
Sample
nuuoer
nunber
53a
53b
53c
54
MJO-70
M3-90
rfol09iC "r it rr
Longiltude
La tHude
(~)
(N
Ea s~ of Squalw Butte d"ne I
43°~0.0
119T46.7 '
sq~aw Butte~d".el
""ight
Ipercen t
teal
gebgraphic Iloca ity
119132.1 '
43°29.0
MilteriiJl
i-----tRj;-;te<1
Percent
ge
age
moles/gin)
40Arrad
(lb 6 yr)
(10 6 yr)
Ix 1011
Rhyol ite
Il\sidilan
5.046
4.258
75.1
Rhyol ite
or si d ilan
4.22
3.209
61.4
2.682
23.26
(1.032)
{~
• 70±0. 7
5.7±0.1
.69±0.67
5.85tD·l72
.ll±0.08
5.27 t O·f8
7.5±l
18.0±2
55
1105
42°b2.3
118IIM'
Oi aster Pe k.
top andesite
Andesf te
pi a9idcl ase
56
SII-4
43"b8.0
118156.8'
Jaclkass Butde
Andesite
Plagfoclase
6.7±0.6
II. 3;!O.15
References
McKee land otheh. 1976;
L~urs.n and Ha""'ond. 1978
00
00
een¢. 1976;
Brolm and ot~ers. l'lBOa
rownland
othe~s.
Rhyodacite
whol e Irock
4.326
7.025
37
Basalt
Whol e Irock
0.605
0.959
II
1.1±1. 3
1l.1±1J3
Do.
57
SH-I05/
UT-204
43"l14.8
58
S1I-106/
UT-194
43"t'1.9
118~21.9'
Southern Ha~ney ~asin Grolup
'
Southern
Ha~ney
18asin Grqup
Basal t
W/lol e Irock
0.780
1.054
16
Ild.
118~30.1
9.44±OJ8
SII-I06A/
AH-35
43421.8"
.44±0.8
59
'
Southern
Ha~ney
18asio Grqul'
Ba salt
~01 el rock
0.895
1.035
16
Ild.
43408.2"
118~53.1
8.07;!OJ 69
SH-1I3/
AH-15
.07±0.69
60
sa"thern Harney 18asfn Grqup
Ba salt
"olel rock
0.321
0.311
00.
43115.7"
118~50.4 '
2. 9i±DI 38
SH-12/
UT-209
.9ItD. 3 81
61
SH-Ill/
UT-214
43144.2"
1181"31.6 '
So
lrt hern
Ha rney 18a sin Grqup
Mrthoc1 ase
2.83
6.316
50
5.4tD.6
15.4±Q16
62
SH-1I3/
AH-15
43135.4"
1181°31. 6'
So~thern
Harney IBasin Grqup
northocl a50
3.16
6.357
23
3.9tD.9
13.9;!O19
63
M-5-7
43121.2"
1181°17.9 '
Vehtor
!/hal el rock
( ~ol e rock
4.37
4.36
10.1522
9.92262
M-5-9
43115.4"
1181°36.2 '
Dome
anidine
6.47
9.87466
6l
661
671
M-5-6
M-5-10
118"26.4 '
43f2D·r
43~14)'
Obsidian
Crilne Creekl dam
DOOle
Obsidia
121°34.0'
Bllue Ridge~and
easttlakof
flood Ri v r Ca~yon
Andesit
121°34.1 '
Gulnsight Butte
Pyroxen
121°31.4 '
8adger Butde Area
Andesi t
121°31.5 '
Milll Creek IBlltt
116°30.7 '
iotilte
7.58
hal" rock
4.77
10.371
6.41098
16'1±0~3
1980b
rown and othe s. 1980b
Eva sand Br wn. 1981
Southern lla~ney ~asln liro~p
1.3;!O.5
118130.9'
~:~~
U1
+t:-tatio~=t--t----tl-------I------II-I-tK;o-----~-d
vans and Bro.jn, 1981
• SJ MacLeod Iand E. H.
un"ub. data
73.4
70.2
15.7tD 3
20.44
10.6±0 7
00.
45.1
9.48±0 3
Ow.
62.2
9.3t .2
00.
Mc~ee.
H"od River ICounty
40,
R0725
45~25.·
49,
R0720
45~18.
~j21
4~020.·
PH-MCll-I
4~"26. "
,
,
fn,ole rock
andesite
'ho
1.
rock
ornhl ende
Wi se~ 1969;
La rsen andl Hammond. 197t;
Wa ker and bt hers. 1974
1.33
1.35
7.0±0.8
1.53
0.925
4.1±0.6
4.2±O.6
01
2.13
0.95
3.0±0.2
3.I±O.2
o
0.271
0.1384
3.7
Hammon~. unpub. data
6.2±1.3
P.
Hot~. 1971;
Jackson county
II}
n
:t}
122°44.0 '
AShl and pl
~ton
Granodibrite
~
rnllende
rn 1ende
(Horn lende
lot te
(81.6)
76.7
86.6
74.4
166
160
167±).5
(8.92 )
(17.99)
18.31
17.67
198.1
144
148± .4
(0.716)
Lanp~~e,
Laursen an
M. A.
HalTl11ond. 197 i
ASH-7 -6
43°10.'''
MED-3-6
43°27./"
123°00.0 '
Gold Hill pI uton
Granodfbrfte
BiotIte
Hornbl ende
(6.77)
(0.451 )
147.4
9.247
88.6
84.5
142
134
'0.
I/IM-8-6
43°41.0'
12ll002.0'
Wbi te Rock I PI uijon
Tronclj h""f te
8i at! te
(9.06)
191.1
92.1
138
Po.
'-1£0-1-6
42°20.0 '
122°59.0 '
.Jacksonville plluton
Granod ilori te
qiot,te
Hornblende
(8.39)
(0.451 )
177.5
9.247
88.6
84.5
138
134
o.
o.
MS-270
4Z002.1..
I
122°36.2 '
Little But~e Arldesite,
Co 1est i nl Font.ati on
Andesi ~e
Ilhol P. rock
(1.017)
1.028
1.005
4.408
31.5
9.11±OJ4
DMS-144
4Z028.12 '
1<12°48.1 '
L,ttle 8utlte A"desite
Andesi ~e
IIholle rock
(0.864 )
0.868
0.B59
1.697
30.0
128.75±0.34
Fobtnotes at en~ of tabular data
o.
MeRirney. 1978;
sotter. 1918
29.5±p.3
Po·
unpub. drata
- ---
- ---- _._------ _._- 1--
--locat ion
Ha
111111
er
Sample
Lat tud
Long Itude
nunber
(I)
(Ii)
'"
01091
,
g l ,graph ic loc 1ity
- -I----
-'
0'\
~ater 'al
nU or
-
Rock typ
-
date
K20
40 Ar rad
weight
x lOll
percent
(moles/gm)
R ported
Calculat d
Percent
age
age
40 Ar rad
( 0 6 yr)
(10 6 yr
Refe ences
Jael son Caun y--Cont.
1-.
7
I)'1S-147
4225.4'
122 °37.5-
[1
Lake
l
la as
Andesite
hole rock
(0.843)
0.844
0.842
1.146
8
H5-262,
NA-137
42 04.6'
122 "20.8 '
Ou e rson
l
la as
Sasalt
hoI e rock
(0.455)
0.457
0.454
9
HS-263,
NA-1758
42 08.2'
122"26.0'
Ou e rson
g
la as
Sa salt
hoI e rock
10
75OSJ235
42 21.1'
122°47.1 '
Ro y Rasa t
aasalt
11
75OSJ201
42 12.9'
122 0) 7.2'
Ro y Basa t
12
77OSJ766
42 02.8'
122 °35.2-
Co e ston
13
76OSJ356
4239.8'
122 °44.6 '
14
76OSJ3551
42 40.3'
15
75OSJ202
If
20.2
.17!0.12
9.42!0 12
0.2264
7.1
.33!0.09
3.45!0 09
0..
(0.584)
0.586
0.582
0.2606
4.9
.0I!0.14
3.10!0 14
0..
hole rock
(0.373)
0.368
0.369
0.381
1.670
25.0
-
30.8!2
8asalt
rhole rock
(0.742 )
0.739
0.740
0.747
3.250
49.0
-
30.2!0 9
III •
Ash-flow
tuff
la9i c1 ase
(0.4925 )
0.490
0.495
2.139
69.0
-
29.9!1 5
III •
Vo e anie '0 ks f the
e stern C sea e range
AndesHe
hoI e rock
acid treated)
(1.2215)
1.216
1.227
5.135
83.0
-
29.0!O 9
III •
122 "41.2 '
Vo e nle ." ks fthe
e stern C sea e range
Ash-fl ow
tuff
lag I clase
(0.323)
0.317
0.318
0.324
0.333
1.340
9.5
-
28.6!0 9
0. •
42 13.3'
122°36.5 '
Ro y Basa t
aasalt
hoI e rock
(1.1205)
1.120
1.121
4.518
30.0
-
27.8!0 9
III •
75OSJ206
42 10.7'
122"33.0'
Vo e anie ." ks fthe
e stern C sea e range
Andesl te
1agi el ase
(0.231 )
0.233
0.229
0.9196
16.0
--
27.4!l
III •
75OSJ221
42 02.£'
12 0)6.1'
Vo e anle
aasalt
flow
hole rock:
acid treated)
(0.498)
0.494
0.502
( 1.876)
1.876
1.875
(50.5)
46.0
55.0
---
(26.0!0.8)
26.0!O 8
26.0!0.8
I
79OSJ041
42 40.
12 "40.7'
Vo e anfe o ks f the
e tern C sea e range
Oasal tic
andesl tee 7)
flow
rhole rock
ae Id treated)
(0.9943)
0.999
0.998
0.986
3.732
82.0
--
25.9!O 9
o.
I
760SJ317
42 41.
12 "37.8'
Vo e aoie o ks fthe
0 stern C sea e range
Ash-flow
tuff
la9; c1 ase
(0.1985)
0.193
0.196
0.201
0.204
(0.7375)
0.7454
0.7296
(13.5 )
14.0
13.0
(25.6!0 .8)
25.9!O .7
25.4!0.8
o.
12 "24.7'
Vo e aoic o ks f the
~o stern Casea e range
Andesito
hole rock
acid treate(1)
(1.369 )
1.366
1.373
5.106
57.0
--
25.7!l
o.
12 "41.4'
Vo e aoie '0 ks f the
~o stern C sea e range
aasalt i
hole rock
acl<1 treated)
(0.5015)
0.512
0.510
0.508
0.500
1.869
39.0
--
25.4!0.8
n.
12 °30.3'
V l ank rleks f the
~, stern asca e range
An<1esH
flow
lagi Del dse
(0.2735 )
0.273
0.274
0.9988
11.0
--
25.2! .8
[
12 °28.9'
V l an1c rl ks f the
~, stern asca e range~
ir trusi
Andesit
lagl Del ase
(0.3405 )
0.140
0.341
1.213
g.O
--
24.6!l
[
17
17 }
17e
2(
76OSJ335
42 04.
21
79OSJ040
42 39.
,
,
,
2'
75OSJ212
421'07. '
2'
75OSJ216
42 04.
,
,noat on
-0
v,
Fa tnotes at end of tabul ~r d ta
ks
f the
~e stern C sea e range
andes'te
----
--
utt r, 1978
b.
G. Smith,
n prep.
I).
~
:
o•
o.
.
.
ation
Ma
f1tJll~ef~
Sampl e
ologic
nlJllber
9
rail lor
flatedal
ograPht~~~
42+25.21,
122~32.7'
/5OSJ233
42tl9.5"
1221'31.0
Volcanic r~ks elf the
75OSJ226
42125.6"
1221'30.6
Volcanic r~ks elf the
estern Cascd~e range
24
750SJ220
2,
26
27
- - ~----~+--+-~--I----~~---+---I---+--~-~--~
75OSJ263
I
42122.6"
1221°30.9 '
~tYP
K20
I wei9ht
~at
I 40
~+--+-----+-----t---+---t----+----+--
Reported
Ar rad
x lOll
(moles/gm)
Calculated
Percent
age
age
40Arrad
d0 6 yr)
(106 yr
-+---j---
Re fenences
-~---=---IMlase
prep.
(0.4245 )
0.424
0.425
1.402
60.0
22.8±oJ8
00.
~hol el rock
(O.BOO)
0.797
0.803
2.627
42.0
22.7±1
00.
(lac id treated)
Volcanic rohs qf the
estern Casca~e range
~hol el rock
(lac id trea ted)
(0.547 )
1.735
25.0
21.9±J
00.
llagiocl ase
estern C~ sCd~e range
0.~43
0.551
28
760SJ 315
42142.3"
1221°35.5
Volcanic ro¢ks qf the
estern Casca~e range
hal el rock
(lac id treated)
(1.3045 )
1.294
1.315
3.924
78.0
20.8±016
00.
29
79OSJ042
42141.8"
1221°36.1 '
Volcanic r~ks qf the
estern Cascade range
hal el rock
(lac id treated)
(0.516)
0.520
0.517
0.517
0.511
1.492
37.0
20.0±016
N.
30
79OSJ033
42150.4"
122r31.0
Volcanic ro¢ks elf the
estern Casca~e range
~hol el rock
(Iacid treated)
(0.6158)
0.621
0.615
0.614
0.613
1.603
8.2
18.2±Ol5
N.
5.8
16.8±ol67
N.
42126.2"
122r25.0
Vol canic rol:ks elf the
lestern ~sca~e range
(0.2525 )
0.253
0.252
(0.3615)
0.363
0.360
0.6130
790SJ90
0.8482
7.0
16.2±O148
Du.
~l aglocl ase
{r
31a
31b
uo~ic
01 e rock
hYdrtf!
and nltrlc
-....J
acl )
'1 agibcl ase
(0.383 )
0.378
0.382
0.389
0.9107
19.0
16.4±ol7
N.
Andesite
hal e~rOCk
nitr'c acid
anI )
(2.463)
2.475
2.459
2.454
2.522
35.0
7.10±ol2
N.
Andesite
hal e~rOCk
nftr'c and
hyd ofluoric
aci )
(2.395)
2.410
2.409
2.366
2.327
22.1l
6.77±Ol2
N.
'holelrock
I (0.725)
(Iacid treated)
0.730
0.720
(0.5660)
0.6126
0.5194
(59.0 )
55.0
63.0
41t
5.86!o
41 b
5.
4.97±0 15
°128
~:
hOlel rock
I (1.2075)
(Iacid treated)
1.199
1.216
0.8501
39.0
4.88±0 15
N.
hal el rock
I (0.849)
acid treated)
0.853
0.845
0.5690
19
4.65±olI4
N.
(17.0)
15.0
19.0
(3.1O±1l 15)
3.27±O 17
2.92±0 11
~:
(Q.6)
ill.
N.
32
76OSJ361
42t54.0"
1221°32.5
Volcanic rol:ks qf the
estern dlscd~e range
33
798earN
42t38.9"
1221°45.3
TaMe Rock flow
34
798earf
42t38.9"
1221'45.3 '
Ta~le
35
8OSJI55
42t40.I"
1221°25.8 '
Volcanic ro¢ks elf the
i 9h Ca sc~de ~ange
Ra salt
36
76OSJ324
42145.21'
1221°21.6'
Re~s
Andesl tel
3/
80OSJI58
42t4 7.7"
1221°23.4
Volcanic ro¢ks qf the
igh Casc~de ~ange
Basalt
38a}
38
38c
80SJ170
42t34• ."
Bl ue Rock.
igh Casc.de ~ange
Rasalti,
andesilte
39
39 }
39
40
Rock flow
fe Rock
IU9h CaSCade ~ange
80SJI60
42r41."
Volcanic rOFks <If the
tl gh Casclade fclflge
76OSJ303
42P38.· •
VO~Cdnlc
ro~ks
?f
th~
Ugh Casclade ~ange
Fooltnotes at endl of tabular data
!/hal
el rock
acid treated)
(0.3465)
0.351
0.342
(0.1546)
0.1634
0.1458
Basalti,
andesilte
hal e rock
acid treated)
(Il.D75)
0.138
0.137
(0.06348)
0.06380
0.1l6315
10.1
9.1
(3.20±O 94)
3.22+1 69
3.1910 19
8asaiU
andesilte
llhole rock
ac fd treated)
(1l.256)
0.257
0.255
0.1087
13.0
2.95±0 15
:>J:
La ation
Mdp
sample
nunb r
nunber
Lati ude
(N)
K;P
Longi ude
G ologic u it or
(W
ge graphic 1oCdl ity
Ma eri 1
Rock type
rt ted
°Arrad
!leight
ercent
• 1011
(noles/gm)
Re or ted
ercent
ge
OAr rad
(1 6 yr)
Calculate<
age
6
yr)
Refere~ces
(10
ads n County -Cant.
41
76OSJ313
42· 3.1'
IZZ' 8.3'
Vol anic roc s a the
f!igh Casca e r nge
Basaltic
andesit
Wh le
(a Id
ock
reatert)
(0.6215)
0.621
0.622
0.1516
42
8OSJI59
42· 5.1'
122' 9.8'
Vol allic roc s a the
f! gh Casca e r nge
nasalt
Whple
(a id
ock
reated)
(0.120)
0.120
0.120
43
76OSJ306
42' 9.2'
122' 7.2'
Dey l's Peak
f! gh Casca e r I1ge
Andesite
Wh Ie
(a id
ock
redted)
(0.734)
~: ~~g
1
KAI280
44' 3.4'
121· 2.6'
Des hutes (M drd )
F nnation
Tuff
Plagio lase
0.245
--
21
.3
2
KA1223
Vdn rd ( ade,
T. 0 S. R. 13 E.
Bes hutes (M dra )
F rmation
Tuff
Plagio lase
0.222
--
58
.3
3a
3b
DAS-67-80
44
4
DAS-66-20
5
J
~ith.
15.0
-
1.69tO.18
0.02162
1.4
-
1.25 tO. I
00.
0.08805
7.0
-
0. 833 tO.58
00.
G.
in prep.
Je ferson C un ty
-e
E er.. en and J meso 1964;
Lau sen dnd an.ond. 1974;
Wal er and a hers. 1974
--
00
120 ~O.O
Cia no Fonno Ion
Rhyollte
S nidi e
(1090)
•
66.78
96
{4 .ltD·6
41.0tl.2
42.1+0.
-
S~ans nand Ro inson. 1968;
44· 3.3'
120 ~7.1'
Joh
Day Fa
Welded tIff
S nidi e
(5.78)
31.41
85
36.4tl.1
37.4tl.
~ans nand Ro inson. 1968:
1978:
IlAS-66-19
44' 1.9'
120136.1'
Joh
Day For ati n A s h - f l o w
tuff
S nidi e
(7.06)
38.07
74
6.ltl.0
37.1t1.P
i/<~ns
1978;
6
M-9
44' 8.4
12116.1'
__
Basalt
Wale rock
0.269
(0.6350)
0.5721
0.6980
(3.6)
3.1
4.1
15.9t3.0
16.3t3.p
7
WR-248
44' 5.6
121\35.0'
._
8asaltic
andesi e
Wale rock
(0.874)
0.880
0.868
(1.184)
1.252
1.115
(10.95)
11.9
10
9.2±0.6
9.4±0.6
00
MR-143-Gb
MR-143
44"68
121346'
M-8
44·~1.4
10
WR-328
44
11
.,
3.9
I.,
.
ati n
.
--'
00
8a
8b ll
Dal ~ple dn Lanphere. 1 74;
lau sen and ....ond. 1974'
Wal er and a hers, 1974
Lau sen and 1Ja0000nd. 1974
Wal er and a hers. 1974
n and Rc inson. 1968;
Lau sen and 1Ja0000nd. 1974
Wal er and a hers. 1974
nnst on9 and thers.1975;
Lau sen and jiaOlDOnd. 1978
--
9
lt
asa
{'f! rnblende
Wale rock
0.446
1.452
0.5351
(1.565)
1.580
1.549
13
(50.5)
56
45
8.1±0.6
7.3tD.l
8.31tO.6
7.5tD.I
00
Do.
121 18.0'
Be chutes F nnatlon
9asalt
Wale rock
0.145
(0.1243)
0.1089
0.1397
(5.2)
2.6
7.8
5.8±1.0
5.9tl0
00.
~0.6
12132.1'
_.
Andesite
Wale rock
1.36
(1.158)
1.269
1.048
(7)
8
6
5.7tO.6
5.9tO 6
I).
WR-246
4436.2
12134.6'
__
9dsaltic
andesi e
W~ole
0.958
(0.7515)
0.7760
0.7269
(5.5)
6
5
5.3±0.7
5.4tO 7
D.
12
WR-l02
4433.3'
12136.0'
__
Andesite
Ihole rock
1.53
(1.175)
1.191
1.159
(29.5)
33
26
5.2t O• 1
5.3±0 1
D.
13
S-74
44125.6'
121~36.0'
__
adsdltic
andesi e
Hole rock
1.100
(0.813)
0.879
0.821
0.939
0.714
(15.25)
17
17
17
10
5.0t O• 2
5.1tO 2
II.
14
M-2
4431.0'
121'18.5'
__
Basalt
hole rock
0.319
(0.2291)
0.2557
0.2026
(7.8)
6
9.6
4.9t O• 5
5.0±0 5
[ •
15
WR-189
4430..
121'38.2
__
ndsalti,
aodesl te
hole rock
1.024
(0.694)
0.634
0.754
4.5±0.4
4.7tO 4
U•
9
eo'
Fa' tootes at end of tabul r d ta
•
rock
(11)
6
16
KzO
Location
Mall
nLllltier
Sample
nlillber
Cleologie ,Init Pr
Longitude
La tiltude
(~)
(NI)
gel09raphie Iloea) ity
"tterilal
Rock typ
ate<
40A
Reporte<1
rrad
weight
x
percent
1R0Ies/gm)
Percent
0
4 Arrad
(0.5846)
0.5815
0.5877
(12.35 )
12.3
12.4
lOll
Cal cui ate~
age
age
(110 6 yr)
(10 6 yr)
References
le'ffebon County- -Cont.
.....
\D
rmstron9 and (lthers. 1975;
Lauben and ~ ...ond. 1978
Andesite
Whole Iroek
1.181
0.3659
2.ltO.2
2.2 t O·12
00
121 t41.9'
Basaltic
andesite
W!>olelroek
1.103
(0.3376)
0.3155
0.3597
7.5
8
7
2.1to.2
2.1±0.2
OOla
121 bB.4'
Basalt
Wholelrock
0.349
(0.08234)
0.08380
0.08077
(4.45)
1.6±0.3
1.6tO.13
00,.
(0.0498)
0.0509
0.0486
(3 )
3
• 54±0.14
0.56tOJL4
001•
121 +z8.6'
17
WR-308
44 "tl 9.2
18
WR-311
44°)9.2
19
WR-ll
44134.4
12Lf46.3 '
44125.2
2.9tO.12
12lf4 1.6 '
44°e8.7
TFJ-427
2.9tO.2
Whole Iroek
B-22
20
1.389
Rasaltie
andesi te
16
Basaltic
andesite
Whole Irock
0.621
14
5
3.9
3
21
5-80
44124.3
12Lf3 7.7 '
Basalt ie
andesite
Wholelrock
0.170
(0.0112)
0.0062
0.0161
(t.05)
0.6
1.5
.45tO.3
0.46toJ3
001.
22
5-23
44124.3
121
b7.7'
Sasaltie
andesite
w~olelrock
0.321
(0.0221)
0.0192
0.0250
(1.5 )
•45:0.2
0.48±oJ2a
00 •
23
PTR-71-5al
44146.9
120~55.5
16.737
65.7
24
10-6-78-
44126.1
1211'05.4 '
CI arno forma t ionl
9.654
Jo~n Day fornatllon
1
'
pi ag f oelase
JoHn Day fo~at fPn
25
PYT-71-1
44 38.81'
120j58.1'
26
648-584
44434.7'
120~57.3 '
27
648-34b
4H45.1"
120~52. 7'
Jolin Day format flon
28
PTR-71-6
44't44.9"
120~56.9 '
Jolin Day fo/mat ilon.
asal manber
29
R08-Tuff~3
44 j 46.91'
1211°12.4 '
Jo~n Day fornatilon
30
R08-TUf-
44+46.8'
121°12.4 '
J06n Day fof,nat ion.
ear top
:~I)
G'\L-12-7
42't33.0'·
1231°42.0 '
G'\L-I-67
42p4.0'·
PP-I-67
42t33.0'
Jo~n
Day
Basalt
• T.I Robinso~ and E. H. Me~ee.
undub. data
69.6
30.8:!:01 5
Ild.
30.38
75.4
30.5
00.
tas ium
fel spar
5.43
22.56
45.6
28.6to15
Ild.
tas 1 UIR
fel spar
6.02
24.57
46.3
28.lto15
Ild.
t
2.156
1.399
5.615
47.14
27.7to125
Ild.
~I ag i fel ase
0.589
1.993
12.37
23.4±31 3
Ou.
Tuff
~lagibe1ase
O.3Q6
1.300
14.28
22.7±2 7
00.
Cheteo Complex
Quartz
diorit
jarnblende
loti e
(0.490)
(7.58)
11.40
175.2
75.3
89.8
151
151
155±4l6
155±4L6
1231°42.0 '
C",teo Complex
Gabbro
jernb/ende
(0.588)
13.52
86.8
150
153±4t 6
12~048.0'
Chete 0 CompI' ex
Quartz
dioritl
I~rnbl ende
(0.422)
82.4
150
153t4 5
84.9
149
153±4l6
140
143:3 0
00.
56.8
138
142:41.3
Del.
81.2
136
139±4l2
0,
Ash-flow
tuff
JOsephine
~ounty
9.715
4
OC-I-57
42to9'9'
12~020.0'
Grrybaek plluton
Gabhro
jornb' ende
(0.658)
15.35
51
G'\L-Il-5
d34.d'
1231°41.0 '
Ch~teo C()nll~ex
Gabbro
~rnb~ ende
(0.163)
(3.485)
3.450
3.520
OC-2-75
421'08.'"
12~021.0'
Grl!yback rlluton
Qllartz
GP-I-67
42~28. ri'
12j021.0'
PP-2-57
42~21.
12j045.0'
H3-105
42~35.·
:
30.9
6.86
Ole rock
5 nid ne
fo~at Ion
(3.645)
3.66
3.63
I
2
fotl~e
(8.90)
188.8
(25.55 )
25.7
25.4
fiotzf
1971;and ~ Ha... ond.
La rsen
d~ta
197 ;
H. A. Lanph re. unpuh.
00.
diori~e
Gr~nt s
Pa s~ pI uton
Quartz
monzoni te
""rnbllende
(0.350)
TrondjhE!mite
'jlllseoY ite
(9.78)
7.483
222.1
15lt41.5
90.7
1M.
Al
Lanpher~.
unpub. dat
I amath Oouoty
FOcltnotes at endl of
tabul~r
,
data
121°13.4'
Bllaek Hll1
s d<>n
Rhyol it
'I ag I10elase
0.930
0.7407
18.1
5. l8to. 5
5. 52tol.55
IMaeLEod and Others. 1975;
Me e and 0 hers. 1975;
La rsen and llalwIond. 197
--+--------+---+------+------t--l----II
Map
Sampl e
flunhelt'
nunber
I looatlon I
long i lude
latit~e
I
Geplogic unlit
I
I
I
t
---I-----h-L
----------1----+1-+-1----l------+--+--I----+---------!-VAr
Calculated
f2 0
rad
I Re""rted
fight
0
geobraphic l~callty
(W
(N)
I
'1ercent
loll
erc:ent
( oles/gm)
OArrad
alge
(10 6 yr)
------!---
age
(10 6 yr)
Referel\ices
K' amath County+ -Cont.
M4-122
121 °21.3'
43°16.5 '
Baldi Mounta inl
arlea ciOOle
5
6
8
M4-135
43°19.2 '
121 °<12.5'
Raldl Mountainl
Rhyol ite
P1.Igiodlase
0.826
0.5973
1 g. 7
4.IB8±0.59
5.02±0.61
Do.
f14-84
43°2P.l'
121°22.8'
8aldl Mountai
area dc:me
Rhyolite
Biotit,
6.81
4.466
40.4
4.143;!O.18
4. 55;!O. I~
Do.
M4-127
43°19.2'
121°p.3'
BurlButte dte c!>onple.
llac ite
PI tgi09laSe
0.385
0.1395
4.6
2·145+O.g4
2.52±<!.9~
HeIKee lmd others. 1976
Basalt
Wh Ie
(1.197 )
1.202
1.195
0.6290
4.9
3.55±0.23
3.6510.2~
S"tterL 1978
Andesite.
tuff
whbl e rlock
1.234
0.40690
6.63
•3±0.2
2.310•
Basa It
WhO! e rlock
0.490
0.13067
2.23
•9;!O.5
1.9±<!.
0.32
0.265832
1.17
5.814
1.544
0.0049461
21.63
0. 023 10.111
ar~a dane
MS-261
NA-348
42"05.6 '
122°.14.5 '
Oute son Age lava
KFW-6
42°1~.O'
121°50.0 '
Vonnla Format ilon
KFE-II
42°2~.O'
121°19.0'
9
M-5-2
42"211.1 '
121°h.9 '
Bly IMountain
10
M-5-3
42"216.7 '
121°j4.4 '
Nea~
~ock
Rhyol ite
PI agiodlase
Bly RidQe
11
760SJ340
42"013.3'
122°j6.7'
Gri ~zl ey Pea,.
Hibh c.scaQe ra"ge
Andesite
PJ9;oJlase
Wh Ie ock
( id reated)
12
75OSJ270
42 °212.2'
122°0.8 '
Mou~tain lak~s Wilderness.
Hilgh Ca sca~e rapge
Ar<!esite
Whple
13
75OSJ275
42°116.6 '
122 °15.5'
Bur~on
Ba salt
14
75OSJ283
42°jl.0'
122°\1.9'
Voldanic roc~s o~ the
Hilgh Casca~e ralnge
750SJ273
42"~0.2 '
122°\2.9'
Mountain lak~s willderness
Butte
Hilgh Ca scaqe ra"ge
I
I
24.0
(1.2315 )
J. 230
1.233
0.6419
22.0
3.6210.~9
Do.
Whpl e ~ock
1(0.164)
(o~jd treated)
0.160
0.166
0.166
0.07873
22.0
3.3310.66
Do.
Basaltic
andesit
Whple ~ock
(a~id treated)
(0.5585 )
0.555
0.562
0.09449
11.0
1.1710.12
Do.
Andesite
Whple tock
(a~id reated)
(I.1935)
1.192
1.195
(0.1596)
0.1603
0.1589
(22.5)
40
5.0
(0.92410.~66)
O. 924±<!. 90
0.923±0. 33
I
lake
42 OJ 7.7 '
120°32.0 '
PaiSley Hill
2a
Ademel1it,
3a
3b
4
lBiPtit
Cuttings
1184011850 (ft)
(1.525)
1.53
1.52
(6.625)
6.68
6.57
7.631
(32.26)
32.26
32.26
29
(53.5 )
50
57
42°115.0'
120°\9.6 '
"leavitt No.ll"
core
42J4.0'
120°18.0'
"Th~as Creel No.1 I"
cbre
31·6±1.5
3 .6±1.0
33
3 .6±1.0
3 • 6;!O. 7
34.4±1.
33.5±!.
Basalt
7[.8+4
3 .3±J.4
{ Ba salt
2 .7±1.8
Th<>]Jas Creekl domE
Rhyol ite
Sanidine
5.130
6.15
42"<11.0'
1200~7.6
Quartz Buttel dom,
Rhyal ite
Rilot it
7.873
8.85
(28.4 )
27.8
29
GWW-3-60 I
42°~8.2'
1I9~7.4'
Aljotho~l ase
Mothoclase
4.8Q
4.95
Ig.gg
19.96
73
63
21 7•5 ±0.8
27.1;!O.8
28.2±0.
27.8±0.~
l*Ii~-4-60
42·~8.8·
119~3.7'
Arlotbok:lase
4.87
18.10
74.52
215.0±0.8
25.6±0.~
I
'
2
Footpotes at end of tabular
da~a
Har~
Mounta i
older corel roc~s
Hart Mo un ta i
01 der corel rocts
r Soda
~
rhyol i~e
Soda
rhyol iUe
MiJntz~rt and Ftld 1968;
Arm trong an others. 19761;
lau sen and
mor<!. 197B;
Wal er, 1980
Do
1200~5.2 '
1
j
Do.,
lou sen and t!amond. 1978;
Wal er. 1980
42° 9.9'
8-1233.
Sample no
Do
Dlmi~n. 1970;
813.4±2
{ Andesite
(36.9)
29.1
44.7
B-1234.
Sample no
6a
6b
I
1
Do.,
1 1
Cou~y
Andesite
Core
95769579 (ft)
1
prep.
I
[Hornblende
Ib
2b
~ock
(a~id ~reated)
I
la
YIJ-JM-291·1
JM-291
i~
0.7029
HIgh Casca4e range
I
Do.
J! G. ISmith,
(0.B085 )
0.807
0.810
o
~5C
Do •
NJ S. Lacleod apd Eo H. HeKe••
unpu~. data
6.0310 •
N
I[-a)
15b
o ~Brieh and Benson. 1981
~te)on
Do
and M<1lntyre. 1970;,
Lau~sen anrt ~r.vnond. 1978i
.1±0.5
8.3±0.
7.6±0.4
7.8±0.
Do
Nbble!and othets. 1974'
Wal er an~ 0 hers, 1974;
lau sen and omond. 1978
00
-------l--------I--+---
-+-------+___
loclat lon
Map
Sample
long itlude
latitude
t
nlJnber
_-I--~
~~}r
M073-33
11
0
cal
r1lJllbe
-----+------I----+----+-------fno------+----+-+---+----+--+----1-----+----+-Calculated
Reil9rted
fl
Arrad
~___
I~F~91I-
Rock
I
Ma1erla
ty~~ted
ight
1011
,.cent
(, oles/gm)
age
6
yr)
References
(10
Rhyolite
wa~er~
1974;
aclod and 01hers, 1975;
5.04±0.7
Ke and oth rs, 1976;
aur en and II lIIlIond, 1978
~)
lOa)
lOb
Do.
M3-33
43°31.8 '
120'416.8 '
Squa\fl Ridge d!>ne
Rhyol ite
Obsidia
3.98
2.116
53.5
M073-39
42°34.6 '
120'317.1 '
McCahh Rutte dooe
Rhyol ite
Obsidi a
(4.52)
4.47
4.56
5.152
76.0
4.42
4.854
55.0
(7.7'~2±0'19
1±Q.19
7.6HO.l
00.
8.605
25.7
7. B±0.50
{7. 7±0.50
7.47tO.5
Do.
40.0
9 0 32
7'r: + •
7.18±J.54
{ 7.17±1.54
7. 38tO.3
Do.
{ 3.3f,6±0.1
9+{).07
7. 71±0.09
( 7.70±Q.09
3.69tO.1
Do.
7.9O±0.0
Mal:lffi and
ieKe
oth~s, 1975;
and oth rs. 1976;
nd. 1978i
aur en and H
al k r, 1980
N
......
lla)
llb
M013-30
42°36.0'
120°215.3 '
Tucker Hill dfme
Rhyol ite
Obsidia
12a)
12b
M073-36
42°16.3 '
120"317.9'
Cou9~r
Rhyol1te
Riot I te
7.99
3
M073-37
42'19.g'
1200315.2 '
Thooas Creek dooe
Rhyol ite
Sarlidin
111.69
14a}
J4b
M4-73
43°0~.2'
121°11.2'
West I of Si I ver la ~e
Rhyo!i te.
ash-floo
tuff
PI ;lgioclase
15a}
15b
M073-343
42'16.1 '
J20 '413.8'
Ore~ Ranch d!>ne
Rhyolite
Obs,dfa
(4.425 )
4.42
4.43
4.670
31.9
7'114to.34
( 7. 13±Q. 34
7.32±0.3
16
M073-35
42°19.7 •
120°511.9 '
Owen! Butte dfme
Rhyo] ite
Biotite
6.55
6.896
15.2
7'111 +0.94
7.30 tO•9
17a}
17b
M073-4\
43°09.1 '
120"017.7'
Hors
Rhyol ite
Obsldia
(4.405)
4.3R
4.43
4.510
67.6
[6. 92±Q.14
l6. 91 t O.14
18a}
18b
MJ-57
43°02.8 '
120"018.6 '
Sout~
Rhyol ite
Sarlidin
(6.51 )
6.50
6.52
6.589
44.7
B4 t O• 22
[6·I
l6.83±Q.22
7.02tO.2~
Do.
M4-14
43°01.6'
121 "Q6.9'
South of Sil v~r l;lke
Rhyolite.
ash-flo
tuff
PI ;lgioclase
0.404
0.4050
12.0
6.I77t!.10
6. 95t!.1 ~
Do.
o
M3-60
43°IS.0'
120'~0. 5'
Elk
Rhyol ite
Biotitel
8.75
8.541
6.57±Q.18
Do.
I
MJ-61
43'00.6'
121"~1.2 '
Hage~
6.85 t O.lf
Rhyolite
Obsidi aln
4.06
3.547
61.2
5·9OtO•09
6.06!0.0
Do.
22a}
22b
M4-130
42°54.9'
121-d8.5 •
Partin Butte dooe
Rhyol ite
Whole r~ck
3.77
2.798
39.5
(5.02+0.20
l5. 01 O• 20
5.15±Q.21
Do.
23a}
23b
M4-431
42°56.6'
121°~9.5·
Yams~y
Rhyodac it Ilc
Whole nock
2.414
1.668
36.7
4.68±Q.17
{ 4.67±0.17
4. 79to. 117
Do.
Peak
daPe coopl el
Mountaih dane
of filrs,
Mountain d~e
~untain ~ane
Mountaih d,*
Mountall n
4.84
t
7.
36!1.5~
HaFle~ and oth rs. 1975;
~Ke
and oth s, 1976;
aur en and llIIIond, 1978
Har,e
and oth rs, 1975;
Ke and oth rs. 1976;
laur en and H
nd, 1978;
alk r. 1980
f
7.1O±O.1~
Do.
Maf:le~ and ot~rs, 1975;
~Ke
and oth rs, 1976;
aur en and
llIIIood, 1978
Do.
Do.
0.3958
12.0
4.47to.84
4. 59to.8~
Obsfdialn
(3.715)
3.72
3.71
2.369
24.7
4.13Ito.34
4.42±Q.315
00.
Rhyolite,
ash-flol
tuff
ObSidi an
3.63
1.797
15.8
3·135±0.44
( 3. 34±Q. 44
3.44±0.415
00.
00.
longl Rutte delne
Rhyol fte
Samidlne
(7.185)
7.34
7.43
2.~08
16.~
2.130±Q.32
( 2~29!0.32
2. 36±0. :13
00.
Con~]ey Hill ~ dan
Rhyol i te
whbl e nock
3.63
3.322
22.5
6H8!0.63
6.35±0.65
Andesite
1I0rnbiende
0.363
2.180
17.3
4!.2 t 4
41.2t4
W~l1s'l1979
Or a~e Peak cqnpl e
Rhyolite
PI a9iodl ase
(0.890)
0.871
0.910
1.890
17.3
I .3t2
14.7±2
wJlls, 1979;
Walk r. IgaO
Peyerl tuff
Rhyolite,
ash-flo.
tuff
PI ;lgiocllase
M()"73-32
43°24.0'
120°53.0'
Couglar f>t>untalfn dime
Rhyol ite
26a}
26b
M4-48
43 °2~.5'
121°~ 7.3'
Upper Dry Crokk
a slh- flow t Jff
21a}
27b
N3-31
43°3~.
5'
120°49.8'
8
M4-42
43 °.17.2'
121°03.8 '
OP-154
42OZr·9 '
120 0t/7.2'
OP-I08
4201~.O
120~8.2'
Footrlotes at end o~ tabulan dat
11.3
0.598
121 '~2.1·
I
0.3558
Do.
43°21. 7'
o
12.45
area dane
M4-30
4
0.335
Do.
M<jKee lind other~, 1976;
laur~en and II/lIllllOnd, 1978
Relported
lOcat ion
Hall
nlinUer
sample
nUliber
lati~ude
(NI)
(~)
Cal cuI ate,
Rnr~ _tlJ~.-+~~~~=t==±=~~tb~~~~
flaterilal
longitude
percent
atedl
"~r'~-'-:"+--+--t------+
Percent
age
aqe
40Ar rad
(1~6 yr)
(10 6 yr)
Reference s
tvo
31
GlW-33-77
42"27.5
120'/39.4 '
Or~ Hfll dclne
RhyDI ite
Alkal i
feldlspar
6.05
14,028
62.9
116.0tO•4
16.0tO.
32
39-78
42"28.0
120~13.5 '
Abert Rim flIow
Basalt
W~ol e
Irock
0.741
1.619
31.4
115.1tO•8
15.1tO.~
Do
33
10-78
42°~2.9
12ot31.7 '
Shqestring ~ttel flow
Basaltic
andesi te
~ole
Irock
2.78
4.220
52.43
O. 5to. 3
10. 5to.~
00
34
7-78
42°~0.2
120j41.0'
Colleman Rim Iflow
8asal t
WIIIole Irock
0.126
0.1549
5.88
8.5tl.3
8.5tl'~
35
69-78
42"20.0
120b1.3'
Whi~e
King nllne
Perl ite
5.533
34.5
7.0tO•4
7.0tO.
Do
PRP-2-70
43 0 04.0
120j48.4 '
Pi clture
Roc~
Basalt
ole rock.
0.471
0.4716
13.1
6.8to,9
6.9to.9
00
37
H-5-5
42'tJ 7.7
119+54.2 '
Rabbit Hlll
j
5.44
36
P a9i clase
0.352
1.4950
8.74
38
M5-4
42°~1.4
119~59.3
Coypte Hlll s dan
Rhyol iti4/
rhyodacitic
Al kali
feldspar
1.850
7.29075
54.37
27.2tO.17
Do,.
39
H-4-53
43°~3.8
121 fzO.4'
Pe~erl
Ash-flowltuff
Plagioclase
0.59
0.399325
4.34
4.7t2
Do,.
KA 1282
43°l;g.9
123~00.4 '
Tuff
Pla9 i Oclase
0.245
SE57-14
44°!2.5
123153.4 '
Syenite
porphyty
Whol e Irock
4.34
HB-17
44 ~12.2
122t02.0·
Basaltic
andesite
Whole Irock
HB-130
44 ~13.2
1221'06.1'
Ba salt
H8-132
44~1l.5
122roo.s '
8asalt
'
Pa s
tuff
OlejrOCk
29.3t5
~al k.~, 1980;
G. • Walkeri and E. H. folc~ee,
unp h. data
00
J.
s.lMaCleod
unp b. data
~nd
E. H. McKee,
lane County
,ver~en
1964;
La u senand
and ~s,
Hammond,
1974
57
1.0
21.4
57.0
3.6
1.052
(0.9704)
0.9791
0.9617
(24.8)
16
33.6
6.2tO.2
6.4tO.12
Wholelrock
0.862
(0.779)
0.759
0.799
(32)
32
32
6.2tO•2
6.3tO.12
001.
Whole Irock
0.451
(0.1691)
0.1584
0.1798
(8)
6
2.6tO•2
2.6tOJ2
Dol.
Wal er and
N
N
3
H3-110
44~1l.8
1221'00.8'
TS-137
44107.3
1211'51.3 '
M-343
43138.0
1231'05.0 •
lOb
34.4
ats
Lau
Wal
Har
0
nlIstrong and pthers, 1975;
Lauhen and ~mmond, 197B
10
Wholelrock
0.451
(0.1431)
0.1316
0.1495
0.1482
(38.0)
93.0
12.0
9.0
2.ltO• 1
2.2t nJI
00.
Husband Vol olano
Basaltic
andesi te
WhDlelrock
0.640
(0.0109)
0.0147
0.0071
(1.2 )
1.7
0.7
.04tO.1
0.12tOJ3a
00.
Fi sher FOnllat ionl
Andesite
43155.5"
1221'41.8'
Li~tle
Butt
olcanic $eriels
r.abbro
MS-252
44 ~13.2"
122~13.6 '
Col umbla Riyer Ilasalt
quivalen
Basalt
~Bi~neY,
4.3tO.46
{
21.9toJ6
197E
Bi ney, 1978:
Sutter, 197F.
W/lo1el rock
(0.419)
1.330
28.6
21. 34tO. 55
Lil>olel rock
(0.690)
0.694
0.685
(0.659)
0.659
0.658
3.537
6.8
311. 39to. 85
35. 3tOJ 9
iii. 36tO.29
14.7tO!3
Dd.
;0/6~
01 e rock
mesh)
1.404
34
utt r, 1978
11
M5-254
44 ~14.2"
122ro7.5 '
CollJ1lbi a lliyer
quival en
~asalt
Basalt
\jhol el rock
(0.624 )
0.627
0.622
1.847
6.3
9.9t1. 94
20.4tz10
00.
12
~S-158
43~31.5"
1221"29.B'
Col umbia Riyer
quivalen
~asalt
BHalt
I-Ihol e Iroc k
(0.510)
0.512
0.508
1.222
31.2
16.14tO.19
16.6t013
00.
13
(]'~S-77
44~07.7"
1221°24.1 '
Ni,hrod stoc
Granit ic
Wholel rock
(4.902)
4.932
4.873
n.3
15. a6tO.18
IS.3tO!?
Od.
Footnot.. at end lof tabuloJr dalta
11.54
hers. 1974
oto and Snavely. 1969
sen and mmond, 1974
er and 0 hers, 1974;
in and
son, 1979
Rdsalt
CP-I73
lOa
I}
Indli an CreeW dlk
--"---
-+---1 -----f--
l .. ation
Sampl e
M, Ip
rlll r
-e-o
latit ude
(II)
nlarlber
Geo
lon91 u1e
(w
ge
--_._--
C
I
1JI11t
I -
K20
Malerlal
0
~~o~_tY
I
~ __ ~:"~~':J-
leight
OAr ra
1011
__~__~lloleS/g",)
Lan<1
Rer orted
Calculated
ercent
ge
age
OArrad
(Ie 6 yr)
(10 6 yr)
Refere (lees
County-~Cont.
14
llMS-159
43 "31.9 '
122· 0.0'
Sardi,
avasl
Andesite
Whol e noek
(1.155 )
1.164
1.147
2.62
10.7
15. 30tO.25
15.7tO.3
.5
CP-166
44 "0p.9'
122" 7.7 '
Col 01
e u·
River Basalt
ent
Basal t
Whol e nock
(1.030 )
1.035
1.026
2.28.
26.9
14. 93tO.28
15.3!0.3
00.
.6
CP-168
43"5 ~.1 '
122" 3.2 '
Sardil
avasl
Andesite
Whole rjoek
(1.548)
1.548
1.548
1.26
34.2
14. 21!0.16
14.6tO.2
00.
7
MS-251
44"1 ~.2 '
122°1 5.0'
Sardio
avas
Basal t
Whole nock
(1.162)
1.167
1.158
2.35
28.6
13. 66tO•17
14.0tO.2
00.
.8
0I1S-161
43°4 ~.7 '
122 ° 0.5'
EI k
i
age II ava
8asal t
Whol e ,.pek
(1.1>45 )
1.651
1.639
2.70
14.2
11. P9tO.15
11. 4tO.4
00.
9
llMS-153
43°3 .5 '
122° 0.9'
Elk
i
age II ava
8asal t
Wh"l e rfx:k
(0.194 )
0.194
0.194
0.3101
6.1
10. 79t O.28
11.1:0.3
00.
MS-253
44 "I .8'
122° 2.7 '
EI k
i
age Ilava
Andesi te
Whole rpel
(1.724)
2.16:
55.7
8.46!0.1I
8. 69 tO.11
00.
~O
Su ter
1.730
I. 717
N
W
197A
~1
CP-208
44 "0 9.5'
122° 2.9 '
Ol.lte ~
age II ava
8asalt
Whol e rfx:k
(1.089 )
1.100
1.077
0.8150
15.4
5.06tO.06
5. 19 t O•O"
00.
~2
CP-205
44 "I .0'
122'" 5.5 '
Oute ~
age II ava
Basalt
Whol e rpek
(0.625 )
0.625
0.625
0.3588
16.8
3.88tO.06
3. 98 tO.0"
00.
~3
U-Cougar
44"0 .8'
122 °1 4.2 '
lava
CoU9~r O~
BasaltIc
andesit
PI a910ellase
0.66
87
I .3t1.8
16.3tl.8
Rushl Creek
Oae He.
PI agloe~ ase
74
1 .9tO.8
13.9tO.8
~4
U-flI-85
44 "0 .7'
122"16.2 '
Tuff
ash-fl ..
tuff
~5
Uan-1I2
44"0 .5'
122°17.0'
Wal k
~b
U-BF-5
44"0 .8 '
122"12.5 '
Cast,
'7
U-Tmw-Top
44°1 .2'
122"11.8'
--
I
eel
ck
p, U9 dlJJle
1
Andesite
PI 9 i oel' ase
Oaei te
Ilh 1e r6ek
Andesi te
Whol e rbek
0.286
0.421
0.838
0.251
0.41
1.35
1. 72
8rpwn
00.
65
1I.5tD. 5
1I.5tD.5
--
9.31t0.44
--
Bpwn
nd other • 1980e
39
8. 9)t0. 34
8.93tD.3
8r~wn
nd other • 1980e;
and 8ro 1m, 1981
00.
rvan
·8
U-Tpb
44°1 .5 '
122"11.5 '
Ti ps (
~9
U-foley
44°1 .8'
122·10.5"
iO
OM-5
43·3 .2 '
122"2 0.2'
tte
Basaltic
andesi tl
Whol e rbck
0.440
0.52
61
8. 9:3.88
8.39!3.8
---
Oa sal t
Whol e rbck
0.660
0.19
95
2. 05tO. 52
2.05tD· 5
----
21. 311.0
I .3tO.7
----
Oaelte
nd other • 1980 e;
E~ans and 8roh • 1981
00.
00.
Brpwn • and othe s. 1980<1
II
OM-49
43·3 .7'
122"2 3.4 '
--
Basalt
i2
OM-520
43·4 .8'
122· 2.2 '
--
RIlyol ite
i3
08-161
AH-79
43·4 ,01 '
122· 1.7'
Burn
dge
~rou
Ilhol e rbek
0.976
3.489
11
2'.7!2.0
24.7t2.0
14
Stack!
UT -199
43·4 .9'
122"3 2.2'
Burn
dge nrou
Ilhol e rbek
0.651
2.07'
35
22.011. 0
22.0!1.0
00.
15
88-301
UT -242
43"4 . B'
122· 3.5'
Burn
dge
~irou
Ilhol e rbek
0.621
I.Q70
II
2I.q!2.9
21. 9t2. 9
00.
16
T-141
UT-247
43"0 .0'
122"16.5'
Tumb
Ilhol e rfx:k
0.80
1.95
28
17.0tD.Q
17.0to.9
00.
17
IIB-NSHI
AH-62
43·4 .5 '
122· 1.8'
Burn
Hhol e rbek
0.29
0.668
3
15.9t7• 6
IS. 9t7.6
00.
18
T-101
UT -254
43·2 .3'
122·17.0'
Tumb
IIh01 e rbek
1.33
2.984
47
E.6tO.6
15.610.6
00.
lotr
otes at end
0
tabular dat
I
Cre~k rotoup
dge ~rou
4
Creek Gl[oup
1!.7!0.9
Do.
00.
Evans
nd Brown
1981
_.- -
------ - - - I----
Ic----
f----~ -----~
K0
2
Loc t ion
Map
I
Illll1Uen
tati tu~e
$amp]
(N)
nUllbe
Longit ~e
r",
geog raphic t cali y
- - ~-+--
(W)
wight
Mat rial
logic uni t or
Rock type
(fc:i
p reent
ed
4 Arrad
x lo ll
(m les/9"')
Rep, rted
P rcent
4 Arrad
a.e
(10
yr)
Calculated
ag,
(l06 yr)
Referen es
ane f.ounty- - ont.
39
T~IZZI
43"29.3 '
122°1 .4 '
Tunbl ebuy Cree le: Gr u
44°06 5 '
122°1 .6'
Ride
44°04 .0'
122°0 .5 '
Mosq i to Creek Gro p
-~f----
I.J
--
Who e rc ok
0.96
1. 964
6
14.1t O• 8
14.1tO.8
--
liho e r( ok
0.530
0.950
7
12.4t2.5
12.4t2• 5
00.
e r' ck
{WhO
Who e r( ck
0.230
0.340
4
10.2t1.0
1O.2tl • 0
00.
--
0.230
0.319
9
9. 6t1. 5
9.6t l • 5
00.
--
Who e r( ok
0.121
0.145
2
8 3t5.5
8.3t5.5
Do.
--
Who e r( ok
0.63
0.734
5
8 H2.3
8.1t2.3
00.
Eva"s a
Rro..". 1981
UT-250
40
41a}
41b
MO-ENGUT -232
UT-241
Creek Gr oup
42
BB-PAT -l'l I
AH-63
43°54 .1'
122°3 .4'
Burnt 8ridge
43
RI-2BI
AH-86
44°0 .2'
122°1 .9'
Rid,
44
MO-I601
AH-49
44004 .5'
122°0 .2 '
Mosq ito Cree
GrOJp
--
Who e r
k
0.430
0.476
1
7. 7to.96
7. 67to. 9
00.
45
MO-l 591
UT-220
44004.5'
122°0 .8'
Mosq Ito Cree
Gro~p
--
Who e r ck
0.400
0.192
8
6. otl.I8
6. 8Ot l . l
00.
46
P-3241
Au-85
44°32.8'
122°1 .2'
Pi nt
--
Who e r
1.13
0.903
9
5. 3to.41
5. 53to. 4
00.
47
M8-1331
UT -222
44°1 .5'
122°0 .2 '
Mosq ito Cree
--
Who e r ck
0.521
0.167
8
2. 3to·37
2.23to.3
00.
48
P-221
AH-73
43°3
I'
122°1 .9'
Pi nt
Creek Gr oup
--
Who e r ICk
0.86
0.244
1
1. 8to.25
1. 98tO. 2
00.
49
P-3191
UT-260
43°32 8'
122°1 .0'
Pi nt
Creek. G oup
--
Who e r ck
0.52
0.130
4
1. 3to.8
1.73to.8
00.
50
P-Notchl
UT -239
43°33 .9'
122°1 .6'
Pi nt
[..reek. Gr oup
--
Who e r ck
1.040
0.147
4
O. 8to.34
O. 98to. 3
00.
51
T-2111
UT -251
43°2 .9'
122°1 .6'
Tumbl,bug Cre< k Grpu
--
Who e r ck
0.82
0.115
3
O. 7to.46
0.97to.4
00.
52
T-2081
Au-74
43°2 .1'
122°1 .1'
Tumb ,bug Cr, k Grpu
--
liho , r ck
0.75
0.083
5
O. 7to.21
O. 77to. 2
00.
53
B8-Tpba
AH-64
43°5 .3 '
122°3 .0'
Burn
--
Who e r pek
1.42
0.114
5
O. 6to.16
0. 56t O.l
00.
54
T-2101
AM-7S
43°2 .5'
122°1 .7'
Tumb ehug Cre k Grou
--
IJho e r ck
0.98
0.024
1
O. 7to.48
0.I7to.4
Do.
55
80-7
43°3 .1'
122°3 .5'
Cham i on Cree
!).Jartz
diorite
Who e r ck
1.65)
1.66
1.63
5.163
4.1
21 7to.8
21. 7to. 8
56
BR-6
44 °1 .9'
122"2 0.4 '
Gold uill are
Quartz
diorite
Who e r ck
1.0D4 )
1.009
0.999
1.945
9.4
13 4t1.2
13.4;!-1.2
57
IOCG5
43°5 .3 '
123°0p.3 '
Litt e Butte
Vo canic 50 ies
Basalt
Who e r clc.
0.300
1.733
1.1
--
39.7tl.4
N
.p-
Tmwll
AH-60
roup
Creek. G oup
Creek G oup
8ridg,
Gro~p
roup
ar a
k
Pokr and other , 1981
Do.
O. R.
,
ux
t
in p ep.
58
I&GI
43°5 .5'
123°0 .0'
Li tt e Butte
Vo canic Se ies
Basalt
Whc Ie r ck
0.798
4.490
38.1
--
38. 7to. 5
00.
59
18CG2
43°4 .5'
123°0 .0'
Li tt e Butte
Basaltic
andesite
Whc 1 e r ok
0,868
4.755
63.7
--
37.7to.9
Do.
Litt e Butte
Vo canic Se ies
Basal tic
WI" Ie r ck
1.128
6.015
23.4
--
37.0t1.3
00.
WIl Ie r ck
0.480
2.525
56.6
--
36.2t5
Do.
0.546
0.551
2. ROI
2.594
54.8
55.6
--
--
35.3to.9
00.
36.1
--
Vo canic Se ies
60
61
62a}
62b
63
1115
43°5 .0'
123°0p.2'
andesi te
1118
43°4 .0'
123°0 7.0'
Li tt e Butle
Va caoie Se ies
Basal t
IBCG29
44°0 .0'
123°0~.O'
Li tt e Rutte
Vo can ic Se ies
8asalt
44°0 .3'
r· O'
IIflAR21
footn tes at en
0
tabul ar data
123°0
Litt e Butte
Vo caoie Se ies
Basdlt
{~~
Ie r ck
flh 1e r ck
WIl I, r ck
0.601
2. fi4q
32.4~0.8
00.
30.3t1.1
00.
I-----l--++=-f----~--II--t--Loclat ion
Map
.L
nunbe
64
Sample
nllnber
7786
Latit~e
(N)
44 °12.5'
Longi~ucte
(W)
122°4Ig.B'
Geologic unlit
lO Ar
ge09raphic lpcaljty
(~oles/!Jn)
Rock type
little Butte
Vo canic Series
Basaltic
lt ttl e Butte
VO canic SeHes
29.1tO.8
Basaltic
andesitE
\/hole rpck
Whole rpek
0.516
0.517
2.120
2.027
32.5
36.8
28. 3tl. 1
21.0±1.0
Andesite
\/hole rock
0.615
0.04074
(0.199 )
0.201
0.199
0.197
0.8761
(0.433)
0.441
0.431
0.427
44 °OJ. 8'
122°06.0 '
67
Skinner F
44 °06.0'
123 °110.0'
Sk inner Butte
Basalt
6B
Ski nner F
44°06.0'
123°110.0'
Sk i nher Butte
Basal t
\/h Ie r ck
(nitric acid)
69
3S-46 (G)
44°04.3 '
122°017.4'
Lowder
Basalt
Whole rpek
70
35-44 (G)
44°011.8 '
122°016.0 '
Three Si ster sl are
Whole rpek
122°06.0'
Lowder Mountali n
(l06 yr)
15.B
3S-33(G)
44°0J.8 '
(lOr yr)
3.165
66
3S-47 (G)
age
OArrad
0.735
122°4Ig. B'
71
ane
Whole rock
44°12.8'
Mounta~n
ercent
References
0.1 R. tiux, in p~ep.
andesi tE
77'1J
65a}
65b
Calculated
rad
lOll
Materia
0
whlle
ck
(n trlcr &
hy rofl uric acid)
Basalt
""ole rock
00.
s.
0.46:!:O.4
N.I
156
30.3tO.9
J.IG.
1.846
153.0
29. 4:!:O. 9
\.043
2.144
116.19
14.2t2.0
0.083
0.102775
2.96
B.6!7.0
00.
0.04
1.55to.2
00.
0.047
0.0105214
0.54
00.
tCleod'l' W, Walker and
• H McKee, npub. data
ith, un uh. data
00.
G.I W. \IIalker and E. H. McKee
npu~. data
lincol n COtJ/lty
SR59-47
44°51.0'
123°419.0'
Hogsback dike
Camptonit,
SR59- 9,
(SR66-1)
44°51.1'
123°515.9 '
Siletz dike
Camptonit
Hownblende
pegmatft~
Biotite
2a}
N
U1
{
2b
3d)
3b
SR57-263,
SR5B-2,
SR57-3
«°48.9 '
123°51.6 '
Lambert Pointlsj]
Gabbro
SR-64-17B
«016.B'
124 °016.8'
Yachats Basal
Andesitic
basalt
S79-6
44 OZ 11.6 ,
124 °03.0'
Bl od.et t rea kl stook
Hephel fne
syenite
EM-20
44 °16.6'
122°d2.6 '
r~k
(5.84 )
5.Bl
5.89
5.85
5.82
1.770
5.029
28.2
59
331. 6tl. 7
34. 6tl. 2
Ta~sum~o
and
Laur en and
81
3~.6tO.98
33.2tl.0
Ta
8.34
42
0.435
(0.B70)
0.873
0.B68
2.04
3.91
34
P1<Igiociase
0.23
1.24
Whol e rock
4.06
Whjle
Ac inol fte
(PI gioc aSe
j
1.00
3.3
1969;
H avely,
ond, 1974;
rv nand 00 son, 1979
to and
avely, 1969;
aur nand mond. 1914;
ary n and
son. 1979;
• 0 Snavely unpub. data
SI,"
32.4tl.0
00.
311.6tl.6
3Q.2
32.3±1.6
30.9
00.
00.
311.6t3.6
31.1t3.6
Snfveltand Ma
La ur en and
eod, 1974;
mmond, 191B
31.B
P. O.
npub. data
18.7
71.4
(0.624)
0.656
0.768
0.567
0.504
17.9 )
23
22
15
10
.3t O•2
1
avely,
inn County
Basaltic
Whole rock
andesf t •
ash-flo tuff
0.7'1J
5.5tO.21
Atst~ng and ahers, 1975;
a ur en and 1IIl10nd, 1918;
Bro
and ot h rs. 19BOc
EM-7B
44°19.5'
122005.6 '
Basaltic I
andesit
Whole rock
1.152
(0.8524)
0.83'1J
0.8657
34 )
46
22
.0tO.l
5.1tO.l
00.
TFJ-431
«019.B'
121°519.6 '
Basaltic I
andesit
Whole rpck
0.621
(0.1299)
0.1013
0.1584
(3.5 )
4
3
.4±0.3
1. 6 to.31
00.
TFJ-256
44°19.8'
121 °519.6'
Basaltic
andesit
\/h~le rpek
1.021
(0.1671 )
0.1553
0.17B9
(4.5)
5
.ltO.2
\.1 to. 21
00.
(O.O'1JBI)
0.08702
0.09460
lo.s )
0.168±0.05
o. 70:t0.0~
00.
(0.0414)
0.0428
0.0402
(3)
3
3
0.143:t0.12
0.44±0.1~
00.
EM-77
TFJ-321
44°U.0'
44°26.0'
Footllptes at end of tabularl dat
122°do.8 •
121°55.5 '
I
Rasaltic
andesit
I
Basaltic
andesi t
I
Wh~le rpek
Wh~le rpek
0.901
0.651
5
9
12
~-II~---II----t--tJ---10Arra-d
I~
--+
Map
ntJubeir
sample
Latitude
Long; tiude
ntJllber
(N)
(11')1
tieplogiC u1it
geObraphic llocal jty
dOted
ercent
1innl
10 11
ercent
(,pOl es/gm)
OAr rad
rted
aloe
(10 6 yr)
44°35.9'
122°d5. 0'
Ore i~enhush tluff
Tuff
PI g ioelas.
( PI gioclase
I .1±0.6
I • ltD. 5
8a)
8b
44°36.2'
122°db.O'
Brel~enhush
fuff
PI gioelase
( PI gioclase
I .0±0.6
I .2tD.6
9a}
OMS-68
44°211.8'
122°36.8'
tluff
Assuifled CollJl1hia ~iver
Basalt equilvalel,t
Sa sa It
lOa}
"'hler k
30 60 esh
{ Wh 1e
9b
ock
Whell e rloe k
OMS-69
44°211. I'
122°al.l'
10h
Assuifled CollJl1hia ~1ver
Basalt equi~al e~t
age
(10 6 yr)
Referemces
County-~Cont.
7a '}
/b
Sa sal t
{ ~lhelle ~ock
30160 mbsh
(0.615)
0.619
0.610
(0.703 )
0.741
0.665
(0.931 )
0.938
0.936
(0. 976)
0.971
0.978
lalursen and H~ond. 1978
00.
00.
00.
2.292
44.9
25.05±0.28
25.7±0.3
2.286
1.1
21 .188±3. 71
22.4±3.9
00.
3.243
14.0
23.27±0.80
23.9±0.8
00.
3.15l
59.6
21 .174!0. 25
22. 3tD. 3
00.
Sultterl 1978
II
IlMS-70
44 °211.2'
122"216.8 '
Assuloed Colllll~ia ~1ver
Balsa1t equilalen
Ba salt
Whelle ~k
30160 nlesh
(1.014 )
1.076
1.012
3.484
57.5
21.183±0.36
22.4±0.4
00.
12
CP-180
44 °45.2'
122 °39.3 '
StaY~on 1ava.
as lIlled Collllllbi~ River
Sa al t equi~al erlt
Basalt
Whell e <joCk
(0.578)
0.581
0.575
1.653
31.6
19.126±0.23
19.8±0.21
00.
13
OMS-58
44°36.2'
122"114.2 '
Elk lake age Ilava
Andesite
Whell e ~ock
(1.638)
1.640
1.636
2.570
35.2
1O.159tD.12
10. 9tD. I
00.
5.120±0.07
14
OMS-75
44°23.3'
122°110.7 '
15
77113
44°32.0'
122°~3.0'
16
781842
44°3B.5'
17
7SHAlIl
18
Outerson age
~
ava
Ba salt
Wh!le i'Ck
(1.019)
0.7848
30.3
Li ttl e Butte
Vo~canic Series
Basaltic
andesi tE
Wh Ie ,joCk
1.318
7.911
87.4
41. 5tD.
122°~1.5'
Li ttl e Butte
Vo canic Sehes
Andes; te
Whell e ~ock
1.197
6.822
19.9
39.2tD.
00.
44°211.8'
122001.0'
li ttl e Butte
Volcanic Sehes
Andesite
Whell e ~ock
1.178
6.037
64.7
35.2tD.!
00.
17121
44°2~.3'
123003.3'
li ttle Butte
Volcanic Selries
Basal tic
andesitE
Whelle rock
0.128
3.671
40.7
34. 7tD. 41
Do.
19
77112
44°3\.0'
122°<19.0'
Ll ttl e Butte
Vol canic SeHes
Basal t
Whelle <jock
1.546
7.622
67.0
33.9±0.
00.
20
71110
44°32.0'
122°~2.0'
little Butte
Vo cantc Selries
Basal tic
andesit,
Whl/le ~ock
0.871
4.169
40.l
32.9tD.41
00.
21a}
21b
71l11RI2
44°H.3'
122°~9. 5'
li ttle Butte
Vol canic Sehes
Basal tic
andesit
WhIle
( Wh
1e rOCkk
0.859
0.913
3.970
4.115
68.3
31.9
3J.1ltD.7
31.0±J.2
00.
22
188R19
44°25.3'
123000.0 '
li ttl e Butte
Va cank Series
Basal t
Wh 1e
ck
0.437
1.997
42.3
31. 4tD. 51
00.
23
78BR31
44 %
.0'
122°~4. 3'
li ttl
e ButteS~ries
Vo canic
Andesite
Whelle rlock
1.155
4.912
42. g
29. ltD. 4
00.
24
78BR22
44 %
.5'
122°~9.0'
li tt e Butte
Andesi te
"'Mle rlod
1.763
7.381
79.2
28. 9tD. 5
00.
122°<17.3 '
Li ttle Butte
1'.)
en
~~9ht
Materiall
0
25a}
25h
/1lII836
26
17118
21
44°211.3'
Vo can'ic Selries
77100
44
.3'
44°23.8'
122°~4. 5'
122°32.0'
00.
0.1 R. lux, in prep.
00.
l
(HIli
Wh Iee
0.492
0.4B9
1.810
I. 712
37.7
40.2
25. 4tD. 91
24.1±0.8
00.
JOCk
ock
Andesi te
Wh 1e
ock
1.28'l
4.731
34.2
25.3±0.4
00.
Li ttl e But te
Andes ite
Whell e rlock
0.512
1.899
30.0
25.1±1.1
00.
Basalt
Volcanic Selries
%
5.34±0.017
Li ttl e Rutte
Vo~canic
Series
Vo canie S~ries
00.
28
7792
44°25.0'
122°37.8'
li tt e Butte
Vo canic S~ries
Oa sal t
Whell e nock
0.477
I. 593
17.2
24.6tD.31
Do.
29a}
29b
1791
44°211.8'
122°39.0'
li ttle Butte
Vol canic Series
Basa 1t
WhGl e rlock
{ Wh$le rlock
0.424
0.430
1.298
1.310
23.2
26.7
21.1±1.1
21.0±J.l
00.
footnptes at end o~ tahularl dat
00.
--I-
Mdll
nUlIl)er
I
5ampl e
Lieation
LaUtude
Long,tude
(~)
nUlIber
I
(~)
--+---1---+-----+-------+-----+---leologic ,Imit lor
g~ogra"hicllocall
ity
30al\7799-~-uiu;o;,tt;lr30b
¥
I
I
I
I
31
7/104
44424.5
122f36.3 •
32
185 P49
44441.3
122f44.8 '
33
7I9IAW
44441.3
34
7195
44443.3
~OICdnie feries
Li~tle
K 0
2
Material
Rock typ
atel
Reported
Percent
age
age
percent
40Arrad
<J 0 6 yr)
(10 6 yr
7194
44°~3.3
Refer~nces
lirln County+-Cont.
W~OI e Irock.
(whole
rod:
Bd salt
0.464
0.470
1.242
1.217
22.4
20;. ?
18.5+1.
17.9!o.
utter. 1978
001.
8utt
olcanie $eriels
Basal t
W~ol e
Irock
0.394
0.919
23.1
17.2tl.
001.
Coll asalt
...bia Gr
Rifr
up •
..ande Ro e Dbsalt
Ba salt
Wholelrock
1.815
3.991
53.9
15.2tO.
Dol.
122f44.8'
coll"abia Ri er
~salt Gr uP.
ande Ro • Dbsal t
Ba salt
Whole Irock
1.673
3.644
41.0
15. Ito·
001.
122f48. 3'
co~"abl a Ri ~r
Basal t
Wholelrock
1.272
2.754
48.2
15.0to.
Dol.
CO~""bia
Ri~r
salt Gr up.
8asalt
Whole Irock
1.368
2.951
60.8
14.9to.
Dol.
Ra salt
Pla9idclase
asalt Gr uP.
ande Ro e Bbsal t
35
Calculated
weight
122f50.3·
ande Ro
e Bb sal t
al heur cqunty
KA-1285
43°[5.4
111102.5 •
Pa~ette
Fonqat io
0.258
27
ver~en
1964;
Laursen and
and f.ames,
Ha... ond,
1974
6.7
Wal er and 0 hers, 1974i
L. • Kiltl an. unpub. dOta
KA-I029
43 0~4.5
111147.5 •
Butlte Creek
Vblcanic Sandstone
Volcanic
sandstone
GI ass Ishards
4.76
CEB-61-76
44°ll.6
118111.5 •
So~theast 0
Mica
Bl oti ne
8.78
Irohside
Mbuntain
diorit,
158.0
91
5.1
91
120
Do.
12l!:6
haY~
and and
Br~wn.
1964; 1974
Lau sen
Hammond,
Mar in and
N
""-J
42°22.8
118103.4 •
Rhyol ite
tuff
Sanidlne
(7.275)
7.19
7.36
(17.07)
11.09
17.05
(81.85 )
80.0
83.7
5.8tO.40
16.210.14
W-18
42°23.0
117139.6'
Rhyol ile
tuff
Sanidlne
(8.56)
8.51
8.53
(17.22)
17.49
16.95
(78.35 )
79.2
77. 5
13.56tO.28
13.9tO.13
001.
Whole Irock
{ whol e Irock
(0.374 )
0.373
0.315
(0.372)
0.371
0.374
Whole Irock
Whole rock
(1.122)
1.166
6a
fi-13
6b
la
Ib
42°~1.9
111149.4'
Basalt
16-1
16-1 (ii)IJ
(i i)
4Joa6.9
Ie
bson. 1979
W-17
III 114.6'
Owylhee Ri dg~ flo",
Basalt
{
16-2 (ii il
aIr pIe and
Wal er and
Lau sen and
0.436
16.0
•87tO.55
8.08tO.156
Do,.
0.431
15.8
.8Ito.55
8.03to.157
nol.
(2.437)
(2.559)
2.843
2.276
2.191
(46.3)
??7.7)
12.9
12.9
60.7
(67.55)
69.6
65.5
(ll.6
t O.3)
(408)
(15.0to.13)a
15.2
6.4
5.4
3.6
14.1
3.4±O.3
13.8to.13
4.6:tl.8
25.3t1.18
aksi~and Watk~ns, 1973;
Wat Ins and aksi. 1974;
Wal er and 0 hers, 1974;
La u sen and ...ond. 1978
wt ol e IrOCk
1.078
5-1 (i)
43°a5.1
117114.3'
Owylhee Ri dg~ floWs
Basalt
Wole rock
1.25
(2.490)
2.499
2.481
UO-I22KAr
43°a7.3
117113.2 •
Owylhee Basallt.
~asal flo
8asalt
Whole Irock
1.024
3.750
15
10
UO-13IKAr
43 o~2.1
117 j48.0·
Tim~
Basalt
W~OI, e .Irock
0.488
1.527
22
1.012.2
21.6 t 2·13
Do,.
11
1J0-II4KAr
43°~1.1
1I7ko.8'
oee~ ldout
Buttemrnna~ion.
ber
Volcanic
sandstone
Jnldlne
8.65
25.22
87
9.
7!:1. 0
20.2tl.0
0010
12a
12b
UO-128KAr
43°a9.1
117'106.1'
Sucker .cree
Ishards
{ Gla~s
5 nld lne
4.94
8.11
13.57
18.47
49
85
8. 5tl. 7
5.4to.9
19.0tl. 7
16.0to.9
~~I:
13
UO-120KAr
43 o~ 1.4
11714 7.7'
Li tltlefleld IRhyol ite
Rhyol ite
PI a9idcl ase
2.68
6.95
42
117.5tO. 6
17.9tO.6
flo,.
14
UO-125KAr
(II)
43°~2. 4
11741.5'
Antlelope Fl at aa'alt
Ba salt
Whol e Irock
1.440
3.35
20
5. 6to. 9
16.1to.6
DOlo
8
Footlnotes a tend bf tabular data
Peak Balsalt
VltrJC tu
FOrlndtion,
f
thers, 1967;
hers. 1974;
dIII1Iond, 1978
001'
Do.
Do.
aurs~n and Halnol1ond. 1974
L. R. Kittlelnan, unpub. dOta
-+--
f----~--+_---j---------+-----~+__
+---+-Ifldeation
Mad
Sa"pl e
latitude
longjtude
Geologic unit or
wei!Jht
atedl
IDercent
Md 1hl
ur Count - -Cent.
-J--
110- Il7KAr
43°40.9
117~10.2'
Ow "ee aasallt
y,.
16
UD-I26KAr
(I I)
43°1' 7.8
117%4.6'
Monfinent Roclk aa salt
17
UO-130KAr
43°~4.
7
117147.5'
Sh!Wa y Ran~h aasalt
18
UO-133KAr
43°h.7
118108.9 '
Jun ura fa at iO'I',
vitrle tu f
19
UO-123KAr
43°p.9
117 20 • 1 '
Gralssy Moundain Fonnation
20
1135
(Trr) •
No. 8
43°bl.2
118101.8'
co~ero
RCG-281-H67
43°12.2
2la
2'b
1
(W ole rock
ole rock
iw
are;;
Riser Cr ek
lded tu f
118
'lo 7.5 ,
(moles/am)
Calculate
Relported
Ar rad
x 1011
Ipercent I
40Arrad
lage
(16 6 yr\
I
age
(10 6 yr)
References
16.1±0.~
l~urs nand Ha!tnond. 1978;
13.2±0.6
13.4±0.~
Do
2.06
1.89
4.65
4.075
18
65
15.2±1.1
14.4±O.7
2.48
4.82
65
14.9±1.1
l • • Kittle an, unpub. d ta
W~ol
e Irock
Basal t
W~ol
e Irock
1.480
2.67
45
112. I±O. 5
12.4tO·f
00
Tuff
Glass Ishards
5.41
9.02
61
11.3±0.6
1I.5±0.~
00
aasalt
W~ol e
0.560
0.632
26
7. 6±O. 5
7.8±O·f
00
Rhyol ite
welded Ituff
San idilne
II7.9±0.5
18.3±0.15
~r",eiand
MarvIn.
Gre ne. 1976
10.3±O·14
9.8±O.6
~alkef' 1974;
Wal er and 0 hers. 1974;
lau sen and
1978
aa salt
Rhyodaci ~e
Irock
5.43
14.41
69.6
rBloti~e
(7.75 )
(0.754 )
II. 52
1.066
51
32
0.O±O.4
9.6±O.6
stnidilne
{ G ass
9.16
5.70
21.80
11.40
51
B4
116.0±0.8
3. 5±O. 6
16.5±0·18
13.8±O.6
Do
Do
\!'
agldclase
aC-I-64
42°1'2.8
117~39.4'
23
DC-2-70
43°47.7
117154.1'
oiter
w 'dedcree~(?)
tu f
Welded tuff
Plagidclase
(1.482 )
3.283
73
4.9±0.4
Is.3±0.4
Do
24
GWW-36-69
44 °04.5
118110.6'
Din er Cree (1)
lded tu f
welded tuff
Plagidclase
(1.770)
3.763
72
4.3to.4
14.7±O.14
Do
25
GWW-68-62
42°08.8
118~10.s '
J
7.01
13.67
85
3.1
13.5
001..
26
KA392
42°58.0
117~35.0'
ROOl> bed s( ?)I
4.89
7.60
79
10.8±0.14
Do,.
27
M4-11s
43°49.8
11mO.4'
Doubl e Moundain
(7.68)
7.75
7.61
a.938
54.3
Vi trophyrte
Welded tuff
~ooe
Al kal
felispar
Rhyoliti4(1).
tuff
G ass
Silicic rock
Sanidlne
28
1649
42°~ 1.3
118~1O.2
29
167
42"09.2
118109.9'
30
CE8-61-76
44°p.7
118 11 • 5 '
31
1703
42°b3.3
lI7ts7.4'
32
1654
42°~ 2.1
118 U 1.2'
Trqut Creek Itop unit
33
M-s-8
43°j>7.8
118107.4'
StQckade
34
OG-2-70
42"148.0
117135.0'
Ow~hee r.or95'
Basalt
(ptagi1claSe
V a9i clase
'
II0.5±0.4
.86±O.21
8.07±0.121
1974;
~alORond.
22a
22b
N
00
K?O
Mdterllal
.~+-_n_lJnher
---I5a
I5b
-f------~---+1.,40.-------+--------+-1---+----+---+-+------+----I---
~acl~
Mc
and ot~ers. 1975;
e and ot ers. 1976;
lau sen and
amnond, 1978
Trolut Creek lash-flow tuff
Rhyol ite
a sh-fl <pw
tuff
Silnidllne
7.67
18.12
68.4
5.9±0.3
16.3±0.13
Horlth of coliderol caldera.
alsh-flow tluff. basal unit
Rhyol ite
ash-fl QW
tuff
Sanidlne
6.50
15.18
75.7
5.8±O.3
16.2±O.13
Di orite
Bloti~e
8.78
91
121t6
Rhyolite
SI.. ld Ine
6.17
14.74
54.0
16.s±OJ6
Rhyol ite
ash-flow
tuff
San id Ine
7.72
12.42
37.0
11.I±OJs
Sanidine
7.76
12.7037
41.44
11.3±OJs
• SlMacleOd land E. H. McKee.
unp h. data
whol e Irock
0.656
1.259
12.06
13.3±IJ5
• W. Wal ker and E. H. McKe
un b. ~ata
1
158.0
121±6
south of Rome
eene. 1976
001.
arvir and Doblson. 1979
• c-!.Greene alnd E. H. McKe,
unprb. data
Do.
""'rlon Colunty
a ur s~n and HaVonond. 1978;
Dc
la
Ib
No. 4
44~41.5
121f59.9 '
Bre itenbl/shltuf fl.
pperrnost un1 t
Dacite.
tuff
2
8X-99
44 ~4 6.0
122 rO 1.6 '
Lidtl e Butt
Andesite
Wole rock
(0.972)
0.974
0.970
3.500
64.1
2t22±0.27
24.9±oJ3
Birhey. 19711;
Sutter. 1971
DMS-43
44146.5"
121 r59.6 '
Breitenbush Ituff,.
ittle Buhe
gnimbri t
Tuff
Plagioclase
(0.884 )
O.B77
0.892
2.594
32.4
19.74±0.24
20.3±OJ2
Dol.
Footnotes at end lof tabul ar data
flows
2.7±O.8
2.3±O.8
KtJ
L at10n
Mar
nu,,~~r
Sample
nUTlber
Latl ude
(N
Long itude
( )
C ologic u it
ge graphic
Mi teri 1
r
oca tty
Rock typ.
~ight
)ercent
ated
40Arrad'
x lOll
Re orterl
Calculate
ge
age
(1 6 yr)
(lor; yr)
moles/gm)
Percent
40 Ar
rad
3.002
20.9
17.24tO. 32
17.7tO.
3.294
34.5
17.18:0.20
17.6tO.
Do
Refer nces
----Marl n County -Cant.
4a
MS-256
44° 4.1 '
122 /B.2 '
Andes Ite
Sar ioe lava
4b
N
lD
{;
ole
ock
ole ock
0/60 mesh)
(1.173)
1.181
1.165
(1.292 )
1. 306
1.277
S~tte , 1978
5
II1S-8
44" 5.2 '
122 13.5 '
Sar 1ne 1ava
Andesite
14 ole
ock
(1.306 )
1.311
1.300
3.240
28.3
11.72:0.20
17.2tO.
Do
6
II1S-5
44 ° 4.2'
122 14.2 '
Sar ine 1 ava
Andesite
14 ole
ock
(1.oog)
1.012
1.006
2.386
17.8
I .94tO.21
16.4tO.
Do
I
II1S-7
44 ° 4.5'
122 14.3'
Sar 10e lava
Andesite
14 ole
ock
(1.595)
1.604
1,586
3.668
17.5
1 .50:0.20
15.9tO.
00
8
IJMS-Il
44° 0.7 '
122 18.5'
Col ~bi a Riv r 8 salt
e ~uival ent
Basalt
14 ole
ad
(0.205 )
0.213
0.198
0.3900
1,7
1 .80tO.76
13.2±0.~
Do
9
IJMS-49
44 ° 4.6'
121 55.6 '
Elk Lake age 1 av s
Basalt
Wale rock
(1.015 )
1.011
1.012
1.688
10.9
1 .23:0.17
11.5:0.2
00
10
8X-256
44" 6.9'
122 11.8'
Elk Lake age 1av s
Oacite
14 ole rock
(2.383 )
2.377
2.390
3.893
15.6
1 .02:0.35
11.3:0.4
Do
11
OHS-40
44" 9.8'
122 ~7.8'
Elk Lake age lay s
Andesite
14 ole rock
1.494
2.420
16.2
1 .96±0.75
11.2to.8
Do
12
OMS-53
44· 3.1'
122 15.0'
Oet oit pluton
()j
orite
WI ole rock
(1.480)
1.488
1.473
2.124
16.1
.68±O.18
9.94±O.18
00
13
MS-239
44° 3.3
121 57.2 '
Out ~rson age 1 av s
8asalt
14 ole rock
(1.987)
1, 995
1.982
1.648
7.1
.60±0.10
5.75±0.10
00
14
OMS-48
44° 5.3
121 56.7 '
Out ~rson age 1av s
Andesite
14 ole rock.
(0.747)
0.750
0.743
0.5216
17.6
•72t O.19
4.84tO.19
00.
15
OMS-50
44° 5.9
121 55.2 '
Out ~rson ag
lay s
Andesi te
14 ole rock.
(0.770)
0.774
0.766
0.5184
7.9
.55:0.07
4. 67 tO.07
00.
16
OHS-47
44° 5.6
121 55.2 '
Out erson d9
1av s
Andes; te
14 ole rock
(1.645 )
1.658
1.633
0.B767
19.B
.60tO. 05
3.70tO.05
00.
17
MS-258
44 ° 3.9
121 56.B'
0" erson ag
1 av s
8asalt
Wale rock
(0.925 )
0.938
0.912
0.3B30
15.8
.80±0.18
2.87±0.18
00.
IBa
IBb
OMS-53
44"49.4
122 08.2'
8a tl e Ax/H gh C scades
lows
Andes Ite
(14 ole rock
1/ ole rock
0.713
0.711
0.2005
0.1357
9.1
5.5
.88:0.50
• 27±O.41
1.95tO 52
1.33tO.43
00.
00.
19a
19b
OMS-41
44 48.7
122 05.8'
8at tIe Ax/Ii gh C scades
lows
Andesi te
U
0.807
0.81B
0.1693
0.14B9
21.8
5.5
.41tO. 6O
• 24±O. 53
1.46to 61
1. 26tO 54
00.
Do •
20
MS-237
44 44.7
122 00.0'
8a tIe Ax/H gh C scades
lows
21
MS-238
44 43.8
121 59.0'
8a tIe AX/ll gh
lows
22
OHS-33
44 49.5
122 OB.I'
aa tIe Ax/H 9h
lows
PEH-77-8.
FRL #4B2
44 46.9'
122 01.0'
23a ~
23b
Foo notes at end of tabul r da a
r.
scades
d scacfes
Satdine Fon at 1 o.
prer par
01 e rock.
ole rock.
8a salt
W101 e rock
(0.707 )
0.717
0.698
0.04634
0.3
.44±0.19
0.46;t0 21
Do.
8a sal t
W 01 e rock
(0.561 )
0.572
0.550
0.02149
1.6
.26tO.02
0.27t0 02
00.
Andesi te
Wale rock
(0.724)
0.725
0.772
0.02680
1.9
.2 5tO.03
0.26;t0 03
Il<.
4.3±1.1
3. ?±O. 8
----
--
e
a9; c1 ase
P ag; c1 as€!
---
---
----
dl1lJ10 oct and a hers, 1980
o•
Mop
Sample
I.ot I ~ude
ReDorted
K 0
2
lo(ot ion
longi tude
flotor iJ1
Gl1nlogic urlit rylr
nt.lllb~r
nunber
----t-
~i9ht
ge
1
-1
(1 6 .....,
d
J"
gl~lase
24a
24b
24c
24d
PEH-77-9,
FRl '4824
44°~5.0'
122°01.2 '
8re,tenbush Formoltlon
250}1
25b
PEH-77-1D,
FRl '4825
44 0~8.4'
121°56.3 '
Rh04odendron Formation
26
PIl-4QA
44 '44.9'
122 °00.6'
Rh04odendron I Fon~ot ion,
ttphro bed
Tephra
Plagl
21
PH-to
44°48.0'
121°55.8'
Hig~ coscadel 9rotjp,
Tephra
28
NS-ll
44°49.9'
122°'3.2'
North Santi ..,
mlning di stric
29a
29b
29c
7103
44°$2.0'
122°~9.5 '
Col ~bia Rfv~r
B salt r",o p,
W nap un Ba olt
3D
7722
44'49.0 '
31a
31b
7763
32
Andesite
1!'4
oge
I1n
'u
6
'I
vr\
,.
t
Re ferelnce s
H....onfJ ond otlers, 1980
Po.
Po.
00.
I .8±O.9
l'O
I .nO.2
I .5tO.2
PI agio lase
Wh Ie od
Whol e ock
Do
00
1 .6to.2
1 .3to.2
[PlagiO lose
\.I'laglo lase
1
Colculate,
0.535
0.8206
6,5
10.4t1.2
10.6t!.
00
Pllagfoclase
0.392
0.2404
12.1
• 2to.3
4.3to •
Po
Granodiorlite
Hornbl ende
(0.445)
0.446
0.443
0.8604
86.7
1~.4tP. 9
13.4to.
8asalt
WHol e rock
1.348
(3.161 )
3.221
3.101
(58.8)
59.2
58.4
(16.2tO.1 )
16.5to·
15.9tO.
123'Ill.5'
8asalt
WIlol e rock
1.300
2.934
42.6
15.6to.b
Do
44°$3.8'
122147.5'
8asalt
[Wllole rock
\.11I\01 e rock
1.406
1.409
3.154
3.132
52.3
51.3
15. 5to.~
15.4tD.~
Do
00
7727
44°47.3'
122139.0'
Basol t
WIIole Irock
1.568
3.503
52.3
15.5to.12
Do
7709
44°55.3
122433.3'
8asalt
WII01 e Irock
1.398
3.037
51.5
15.0to·14
001.
33
34
7798
44°",8
122456.3'
Basol t
,",01 e Irock
1.434
3.054
27.1
14.7to.12
001.
35
77231\H
44°1\9.0
123tOl. 5'
co~umbia Rf~er
Basal t
,",ole Irock
1.736
3.659
45.4
14.6to.14
Dol.
36
7729
44°1\7,3
122t39.0'
co*.umbia Ri~er
salt Gr up,
rande Ro de B~salt
8asal t
Whol e Irock
1.238
2.508
48.3
14.5tO.14
Dol.
7757
45135.1
1221'06,5 '
8asalt
whol e Irock
1.804
4.082
48.7
15.7tOJ4
7755
45135.1
122f06. 5'
Columbia RI er
!\asalt Gr up,
anapum B sal tl
8a salt
W/lQI el rock
1.744
3.898
62.5
15.2toJ2
SR59-61,
SR59-17
45413.1"
123~43.9'
MtJ Hebo sill
Diorite
11agioclase
(2.86 )
2.69
KA2161
45f28.5"
123~58.0 '
De""e 8ay Bhal
8asalt
hoi el rock
(1.59)
3.564
KA214DR
45r9.5"
1231°58.0 '
DePoe Bay 8~sol
Basalt
hoi el rock
(0.770 )
1.6553
ase
ttphra bed nearl base
Pbwer land othe~s, 1981
0, R.llux, in Wrep.
00
w
o
salt Gr Up.
anapun B sal t
Multonomah county
collumbla Rif:r
~asal t Gr up,
ande Ro e B~ solt
• R.I lUX, in Iprep.
DQ,
Till iIJ100k County
YIJ-IN
6.0tO.65
16.4t0166
ats~to
3R.3
5.2tO•6
15.5t016
urnIr, 1970;
Sn vel y andtothers, 1973;
Wa ker and thers, 1974
la rsen ond Hammond, 197
15.3
4,5tl. 0
14.9!lfO
3.634
25
5, 5to. 4
16.3tD 4
6.1016
50.3
6.0tO. 9
46.DtO'9
6.76
2.82
45145.01'
YOll
r ootnotes at end lof tabul ~r dato
123'58.0'
Ne~hkahnie ftounhin
ill
Basalt
Tillamook Vplcarlic Serle
Basal t
Ijhol el rock
(1.542)
1.54?
1. 542
0.913
l
andjSnavel Y, 196~;
la rsen and Hammond, 1974
P. D. SIlove y. unpub. data
00.
ieloland cresfY' 1973;
laksen and Hammond, 1971
~09fjl and ot~ers, 1981
-+
Hap
nllqbe
Sample
nlJaber
latitfe
(N)
lOng1t~e
(W)
1-1I--I~-fArrad'I I R e p rted
a'ile
MatbriaJ
J~9ht
J 1011
p~rcent
Ge1logie unjt
Mattria
01
geoJraphie
l~al Iity
percent
da ed
Rock type
Ti 11 amobk
6a}
6b
6e
Till~ook Volhnlc1 Series
Y051
7
o78-T-5
8
078-T-3
10
Till fOOk vOllant] series
Till ook Vol ani Serles
Count~-
age
(njoles/gm)
4 Arrad
(In? yr)
(l06 yr)
(5.3693)
5.5290
5.2095
(~9.95)
~8.5
(44 5!0.6)
45 8±D.5
4 32 tO.6
(44.5!0.6
45.7±D.5
Refereoces
-Cont •
0.B31
Sa sal t
Calculated
31.4
Ma<lill land otherS. 1981
00.
Do.
00.
8dsalt
0.566
3.7605
~8.3
45 7±D.5
8a salt
1.110
7.0784
51.6
439!0.5
43.9!0.5
Do.
42. 7±D. 5
00.
Do.
n06
Till
nok Vol ani
series
Basal t
1.546
9.5721
46.7
42 7±D.5
078-T -14
Till
ook Vol ani
Series
Basal t
0.953
5.9128
168.2
42 7!0.4
42.7!0.4
29
271.4!5
28.1!5
walkerll973;
'alk rand ot rs.1974;
aur en and H ond, 1978
14.5±0.1
0'1 A. wan son a r Eo H. McKe
unpu • data
11.6±6.7
Do.
walker 1973;
IWalk r and ot~ers. 1974;
laur en and HanlOond. 1978
Urn"t 111 a Cot!nty
JohnlOaY Fonnat io,
21.02
Rhyol ite
Andrthocl ase
I( 5.15)
Basalt
whdl e rbek
I
1.384
2.900
I 1.104
1.854
CC-1
45°03.8 '
118°411.5 '
OSTW-77
-245
45°50.5 •
118 °111.4'
OSTW-77
-249
45°49.8'
118°110.2'
Col
fa Rive Ba alt.
Fr nelman S rin s( 1)
Basalt
whdl e rpek
SC-I-7D
45°01.5'
118"28.4 '
Clarno Fonftatllon( t)
Andesl te
Pl;lgiocilase
1(0.523)
JOhnlOaY F°mlatioM1)
Vitrophyr
Bittit,
(7.89)
31.73
6.75
40.1
(7.83)
7.86
7.80
40.52
~ia
ColFr nelman
Rive[
Bajalt.
S rin
s( 1)
48.2
3.32
~Ion CountY
()jW-56-69
w
45 "09.2'
118°~8.5 •
WT-487
45"O~.2·
117"/6.4'
Wall owa Bathdl1th
Granodiorite
BI tit.
YU-WT-180
45°111.7 '
117°:\1.5'
Hall bwa Bat hdl1 th
Granod iorHe
BIOtit
F-2
45°*.2'
117 °44.2'
Grafe ROnde Ba sa' t,
9uplflws
Ba salt
0.230
0.4584
l-44
45 "214.4'
117°41.2 '
Col bia Riv r fl ws,
Gra de Ronde
Nephel ine
Basalt
0.325
0.5442
HM-2
45"219.1 '
117"42.2'
Gra~de RondeIBasa~t.
Basal t
0.324
0.5374
0-8
45°119.6'
117°41.3 '
Gra~de Ronde IBa sallt,
g~oup III flows
Basalt
2.030
2.784
-'
8
2.186
1seet~on
67
2a.2!0.8
28.B!0.1
89
2 t.OtO.8
27.7!0.
Do.
36!4
139±4
Arjrnstrbng and o~hers. 1976;
laurSen and HanlOond. 1978
18!4
121!4
Do.
78
13.8!2.
7.71
t
wJ H. ~aubeneckl and Eo H. ""'!<ee.
unpup. data
U.6±0.
Do.,
5.59
11.5!2.
00
8.42
9.5!1.
00
10.3
9~ouP II flows
willi owa County
I mrle West
f Pe es Point,.
9J675' el evatio
,T J 1 Nl. R. 47
Granl te
Picture Gorge Basalt
Basalt
Imn ha flows
H t Point eet on;
P et ure
Basalt
Wllole rock
1.71
(3.877)
3.860
3.905
3.B69
(53.6)
54.0
52.9
53.9
(1~.3tO.3 )
15.7!D.
Sa salt
Hllol e rock
1.49
(3.369)
3.360
3.378
(48.8)
49.0
49.6
(l15.2!0.3 )
15.6±0.
(0.332)
0.335
0.328
0.334
(B.19)
8.21
8.17
30.5
32
29
l60±5
164±5
1~.6e
45°:\1.2'
116°.5.2'
8-2 (i)
45-a7.0'
116 °44.0'
YU-WT-146
45°16.0'
117'125.6'
Wal owa Bath lit
(~ .".rr,o£ •. ".J
Gabbro
WT-204
45 °1 1.5"
117114.0'
Wal~owa Bat~ollt""
Granodiorlite
at end of tabular
t
Go~ge ~asalt
Imn[ha
fl ows eetion;
11 t Point
P eture Go e Basalt
Craig Mountain
da~a
Taubeneck, 196:(,
La urlsen and ""nIOOnd. 1974
Wallowa BathOl itt
19-2 (ii)
Foo~notes
49ts e
Bipt it
I
H<lrnbl~nde
810title
6.51
149!5
WatkijS and Ba si. 1968;
lau sen and .....ond. 1974
Baksl
Wat
lau
Wal
and Watk ns, 1973;
Ins and
ksl. 1974;
sen and
ond, 1974;1
er and 0 hers. 1974
Do
Armstfong and l>thers. 1976;
lautsen and ~amnond. 1978
Do
----"------f---lL;;datton --t----~I~----I~t--t---~---I--II~Hap
IIlJntJelr
sampl e
nllnber
La titude
(H)
Longidude
Materiall
Ge"logic unlit 0
(w)1
Rock
typ_,:~~
20
-
OArra~
Rep
• ight
loll
ercent
percent
( oles/gm)
°Ar rad
rte~
a e
(10
1
yr)
calculatea
l
age
References
(1_0_6_y_r_)+~~-+~+-_
_+
.__
~+_
--I------+---I--I----I-------l--+-f-I--il----+----I---+-i--+----}---+--+--+----+Wall wa Bathq1 ithl
Po e Bridge unit
WT -211
8a} I
8b
YU-WT-216
45"le.4 '
I
Wallbwa BathQlith
Po~e Bridgel un;
II 7°a5.0'
Quartz
diorite
Tonalite
granOeJiJrite
7.35
Biotitel
~
1101nblelnde
(L3~)
0.382
L~
Ri Ute
(8.36)
62.4
U4±5
147±5
Arjnstrolng and o.hers. 1976;
aursen and l'4rrmond. 1978
143±4
147t4
Do.
1126±4
129±4
Do.
70.5
1124±4
126±4
Do.
71.8
1119±4
121 ±4 b
Do.
(8.673)
8.657
8.688
60.7
29.5 )
35
24
76
L~
Lm
WT -811
45"1~.7'
117"28.5'
10
WT -308
45"1 ~.8'
117"110.0'
II
WT-582
45"16.4'
12
WT -1019
13
(9.07)
Quartz
diorite
Riot i tE
wallbwa Rath<jllth
Crlaig Moun~ain
Quartz
diorite
Bi't itE
~~
117"27.4'
Wall Iowa Bathdl ith
Quartz
tobnzoni ~e
RiOtitE
(7.41 )
7.46
7.36
45"1~.2'
117"21.4 '
81 ue lak.e co ier te
tr ndhj""i e
Trondhje.ite
8iott tE
7.12
OB-19
45"48.5'
116"42.2'
Basa It
Whol e nock
1.003
2.530
55.7
U.4t1J.3
17.4t1J.
14
OB-23
45"48.5'
116°42.2'
8asalt
Whol e nock
0.900
2.209
37.2
U.otIJ.5
17.0tIJ·
Do.
15
08-12
45"48.5'
116"42.2'
Ba salt
Whole nock
0.848
2.063
29.4
IEl.8±O.9
16.8±O.
Do.
II.n~a fl ows~ Ilug~Bar
8asalt
Whol e nock
0.970
2.319
23.4
IEl. 5±1. 2
16.5tl.
Do.
Imn~ha
Basalt
Whole nock
1.738
4.358
48.5
WalT bwa Bathdl ith
Dug Bar
• R k
typ (1)
~~
~~
17t3 b
02.6
63
95±3
00.
97±3 b
Do.
HqKee ~nd other~, 1981
k
W
N
16
OB-15
17
1-74
45"48.5'
116°42.2'
t pe sect! n. R k
C ek ma!JR typ (1)
flows
Jqseph Voldanic
17.3t1J. oe
oJ A.
~wanson
and E. H. HcKe
U"pur' data
18
OB-6
45"418.5'
116°42.2 '
Imn~ha fl ows~ Ilugl Bar
t pe secti n, ~nerican
B r ma!JRa ype
Basalt
Whol e nock
0.735
1.695
19.8
16.0±1.
Do.
19
08-7
45°418.5'
116°42.2'
[mn~ha fl ows~ Ilugl Bar
t pe sect1 n. ~erican
R r ma9.a ype
Basal t
Whble nock
0.690
I. 382
16.00
13.9t2.
Do.
20
08-20
45°418.5'
116°42.2'
Imn~ha fl ows~ Ilugl Bar
t pe sect! n. Rl>ck
C eek rna9' typ
Ba salt
Whbl e nock
0.974
I. 768
19.85
12.6±!.
00.1
21
OB-2
45°418.5'
116°0\2.2'
Im~ha
fl ows~ Ilugl Bar
t pe sect 1 n. Pict ure
Basalt
Whble neck
0.466
0.3558
I. 74
5.3±4.
Do.,
8Hsl ~and Watk~'ns. 1973;
Wat Ins and aks;. 1974;
Walker and others. 1974;
Laursen and ammond. 1978
rge ona!JR
typ
asco County
18-1 (i)
45°116.0'
121°11.0 '
Butller Canyo'i'
Yakima Basalt
Rasalt
Whpl e ,rock
1.892
(4.596)
4.596
4.596
5.176
(82.75)
80.5
85.0
34.1
16.4tO.3
16.8±O.
8-9-1 (i)
44"50.7 •
1200~5.4
CoWj Canyon.
Rasalt
~Ihble
1.77
(4.036)
4.047
4.025
(76.4 )
68.9
83.9
15.3±0.3
15.8tO•
cowl Canyon •
P cture GoMe,
Y kima Ras~1t
Rasalt
(7.564)
7.631
7.497
R.6B
(R5.65)
86.0
85.3
17.4
15.3t1J.3
Rutler Canyo".
Y kima Rasalt
Rasalt
(3.990)
67.9
66
68.R
a.6±0.3
'
"ock
P cture Gorge.
Y kima Rasalt
2-2-2 (i)
14-1 (i)
44°52.6'
45°16.8'
Footnotes at end M tabula.. dat
120"55.2'
121°10.8'
W1,~1 e rock
W~ol e
rock
3. 1I
1.844
3. q72
4.007
00.,
00
Ilo
15.8t1J.
Do
Do
00
Do
15.0±O.
Do
Do
Do
-- --
f-------~---+_+.-------+-
localtlon
Map
ntlul>er
I
Sample
Latitu<lle
lOn91tfe
nllJlber
(N)
(W)
-
--+----- -.-·---l-----·--+____ ---+--+-+----Kt;l-~Arr.~---j-j;.-;;-o~Geologic
uni~
01'1
geOgtaPhi~a114Y
I
I
Rock type
Mat~rlall
we~9ht
percent
ddU..1
-~:YFOnna
'-"1" I '" "1'< ""~'~s~i sheet
.110
11
(m~les/gm)
9.25
648-552
44 °5510'
No.6
44°4313'
120 0 Ul.9'
John Day ForOlaltion
Sa sa 11
No. 4
44 °3910'
120 0 uLo'
John ~Y Fonnaf ion
Tuff
Sanidine
No, 1
44°4010'
120·14.0'
John
Tuff
Al blte
Pl'lircent
4"Arrad
I
Calculated
age
ag
(10 6 yr)
1
(10 6 yr)
Referendes
~
P
1".'0
I--~
I
I "'VIU.'.
I
u
Wheel er Coun~y
4a)
4b
120°1$.4'
John Pay Fonnalli on
(bsidian
{ Whole
Who e rOrk
1'0 k
44°4114'
120°04.5'
John Pay Fonna~ ion
Al tered
pumice
Cel doni e
No.3
44°4211'
120·ul.o'
John pay Fonn~tion
Tuff
Sanidine
Pay
3
00.
215
00.
2
214
00.
00.
2~±2.4
00.
:1
art ~ac1alse
00.
No. 5
44°39W
12001~.9 '
John
44°37L6'
120°14.2'
Cl arnb Fonnat flon
Andesite
Wh01 e rack
1.17
37.15
KA824A
44 °38L3'
120009.8 '
Cl arnb Fonnat ilon
Bentonitic
clayston
Sanldin,
5.53
36.15±0.9
10
KA1204
44 °55L 9'
120°2$. g'
Cl arnb Fonnat lion
Tuff
PI a~ioc1lase
0.631
34.10
11
KA1384
44°541.9 '
120"21.2 '
John IDaY Fonn~tton
Bentonite
Sanldin
7.645
2
32'1
12
KA845
44°43L2'
120°13.4 '
John Day FonnJtion
Sa sall
Whol e rdck
1.45
5
31. 5
Fonndlt ion
00.
4
KA818
H
W
Fonnaltion
44°3913 '
No. 2
5
W
~y
Hayl. 19~2,
Laursen and Htand, 1978
Ev~ndeland
nlaw and ot~rs.
Par er,
1964,
1972,
urs n and Hand. 1974,
lke and oth rs, 1974
00.
EV$nde~ and at~rs, 1964,
urs nand Hand, 1914;
alke and ot h rs. 1974
00.
0
Ev~rndei and ot~rs. 1964,
nlow
and Par er, 1972,
nand Hand, 1974,
walke and oth rs, 1974
~aurs
13
KA489
44 °311.9'
120°16.2'
John IDay Fonnatfon
14
KA648
44 °39.4'
120°11>.5 '
John 10ay Fonnat ion
15
KA649A
44 °4d.0'
120°14.5 '
John IDay Fannat ion
Sanld1n
(bsidi an
Whole rdck
alke
Pot~ssi
um
°
1.72
16
KA647A
44°411.9'
120°11>.9'
John 10ay Fann"tionl
Rhyolite,
tuff
Sanlid i n
6.86
17
KA646
44 °34.2'
120°1 V.4·
JOhnjOa y Fomat ion
Cl aystone
Muhri
4.2
W-14
44°29.8 •
l1g04Z.4'
19
W-15
44 "29.8'
119°4~.4 •
Rail
As
Ra
10
esnake
-flow Tu f,
tlesnakerFornlation.
er tuff
Rattlesnake
As -flow Tu f;
Ra
tlesnaketFon~atiOn~
9
and ottrs. 1964,
nand Ha and, 1974;
and ath rs, 1974
Evernde and ot rs, 1964,
n1
and Pa ker, 1972,
aurs n and H ond. 1974;
al ke and ot ers, 1974
25J5
5.43
alhit
18a}
ISb
Ev~rnde
Ll-aurs
31.11
6.88
Rhyol ite,
tuff
24J9
00.
23J 3
Everndt. and atts, 1964,
aurs n and H ond, 1974,
'alker and ot ers, 1974
00.
21 6
1
6 7+0.2
6. 9tO.2
6.R5±Q.2
oal.rymi e and alliers, 1967;
lavenport. 19 Oi
alk I' and at ers, 1974,
aur nand Hand. 1978 ~
'alk 1', 1979
5.115±0.18
6.1 0tO.l
00.
12
6. 11[0±3.9601
46 1±4.0
46.1±0.4
145
406±0.9
0.55 4±0.90201
41.6±0.9
Rhy01 it.,
ash-flow
tuff
Anolrtho¢l as.
4.98)
5.00
4.95
4.923
139.6
Tuff
Ana~hoclase
5.68)
5.69
5.67
4.998
7.9
0.578)
0.568
0.588
1.808)
1.820
1. 795
3.889
up er red w 1ded tuff
20b
20a}
Ho ~nb 1end e
1/-3-58
44°31.0'
20c
20d
Footnotes at end of tabul arldata
120°113.5'
Cl adlO Fonnation
Andesite
{ Whd1. rock
10.95
Enlows~and parkJr, 1972,
alk I' and ot ers, 1974,
rmst rang and others. 1975;
aur en and H 1TI1l0nd, 1978
no.
----+.. - - - - - - j - - . .
I
H_p
Sample
-"1
"~"
_
21a
21b
21e
21d
21e
h
22_
22h
22e
22d
22e
h
23_
23b
23e
23d
23e
1\I
24a
24b
24c I~
24d
24e
25a
25b 1\
25e I
25d
25e
w
.f::>
~--. -
I
Latit~e
Longi~ude
l=:1±:j
KFO-1702ll
KFO-1I12
H-859
KFO-901
EMT -11
1-+--+------r
o--fJ
Arrod
..~--.~---.-,
LOQ_tion_+--
44 °315.4 '
44°315.8'
44 °315.2'
120"l! 1.0'
120°13.0'
120 j 0.4'
0
c.ebloyic
''''it ,
'f -i ""I
'oc,' "_
_
CI_rlno
Fonn_~ion
Lo""r Cl arno IFonnati on
Cl a~no Forma~ion,
'oc'
8asalt
Andesite
Oi ahase
Matoriall
ih~r'"'
heel r County -Cant.
Whol e nock
WhOle nock
Whole nock
d,lke
44°314.0'
44 0~3.4'
120 0 @7.0'
120 jO.8 '
0
Upper Cl arno IFonnation
Cla~no Fonna~
ion,
Andesite
Diabase
Whole nock
Whple nock
dike
44°~6.8'
120"IIJ0.6 '
John oay Fon,_ti o~(?}
J3.1'
12016.2'
Clanno Format Ion
44° 5.9'
120 °\1.4'
26
PTR-71-9a
21
E-16-11
2~
648-695
44
44° 3.9'
29
PTR-l1-11
0
12048.2 '
Joh
Joh
F~atiot
_t 10
oay
oay Fo
1e i ght
Pl~giodlase
(1.442)
1.446
1.434
(1.130)
1.145
1.115
(1.000)
1.007
0.998
0.994
(0.151)
0.159
0.155
(1.053)
1.054
1.044
1.062
(0.501)
0.507
0.507
0.501
10
11
Calcul ated
r.epprted
ercent
I
alge
I
r'd~' ~
(9.693)
(7.231)
(4.900)
(0.768)
(4.478 )
4.229
73
62
26
8
66
63.23
(4 .9!0.01)
45.03to.9O
5. 0299tO. 900
44.81to·90
4.8 56!0.896
".' ,", ~
age
46.1tO.011
En~ owsiand parUr, 1972;
la lk r and at ers, 1974;
Irms rang and others, 1975"
a ur en and
44.010. 6
(3 .4tO.9)
33. 48tl. 27
3.4 57tl.273
3330+1.23
3.2 6611.232
34.3!0.
1
Do.
00.
00.
00.
Do.
00.
00.
llo.
Do.
00.
(3 .8t3.0)
3559+3.41
5.5 8613.407
3009t4.71
0.0 23t4.705
33.1!3.
(2
29
9.4
29
29.
29.3!0.
Do.
00.
Do.
00.
Do.
00.
00.
00.
Do.
00.
57.0
pJ T. LObinson land E. H.
unPU~. data
Hornbl ende
0.256
1.826
9.9
48.9t5.
00.
HornbUnde
0.359
2.460
6.97
47t9.
OO~I
[gnimbrit
Pl~giodlase
1.440
5.628
51.62
26.94!0.23
00.,
Air-fall ~uff
Poltasslum
feldspar
1.42
59.6
26.8tO•
00
Andesite
m ddl ... l
r unit
P cture Go ge i nimbritl
30
648-456
44°"5.9'
120°\1.5'
Joh oay Fo _ti n,
b sal air- all uff
28.79
FOOT OTES
aRec 1cuI ated agejaries mqre t~an 5 perFent frOln PUbli shed _g
b AnOl olous age:
ge appea~s tolbe eithe~ too old or 00 youngl ha$,d on ot~er geologic olr geochrdnoloaic data.1 Check soureol reference fdr more soecHIc infonnl_tlon.
coat exc1 oded fr
averag
dApp ox ilOate loca ion.
e Loc tion not pIa ted on ir\dex lIap.
lTlllond. 1978
00.
(4 .8to.6)
43.35!0.81
3.3 810.687
4 .3tO.85
2.3 1410.846:
.4!0.4)
45!0.59
61!0.588
33+0.59
317!0.5866
t=
Referemces
:=:ttj
McK~e,
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35
•
Curtis, G. H., Savage, D. E., and Evernden, J. F., 1961, Critical points in
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U.S.
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36
•
Hammond~
P. E., Anderson, J. l., and Manning, K. J., 1980, Guide to the
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37
•
•
•
Nicols, S. L., 1977, Age dates from other publications--List 1:
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1
:
38
,
..
Swanson, D. A., and Robinson, P. T., 1968, Base of John Day Formation in and
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ll
:
p. El-El6.
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39
Woodburne, M. 0., and Robinson, P. T., 1977, A new late Hemingfordian Mammal
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40