St. Matthew
N
W
1-2
Andesite
K-Ar
Whole-rock
Pyroxene andesite flow, minimum age
Wittbrodt et al, 1989
12-105
Basalt
Minimum age
12-106
4-16
5-123
Minimum age, same flow as 5-125
5-125
Minimum age, same flow as 5-123
5-27
Minimum age, same flow as 5-29, 5-31, 5-33
5-29
Minimum age, same flow as 5-27, 5-31, 5-33
5-31
Minimum age, same flow as 5-27, 5-29, 5-33
5-33
Minimum age, same flow as 5-27, 5-29, 5-31
Goodnews Bay
50AHr 49
Amphibolite
Hornblende
Approximate location, Corrected with new constants
Turner and others, in prep., 2006
50AHr 747a
Quartz diorite
Biotite
Replicate analyses, 444.7 average age
Replicate analyses, 542.1 average age
71AMm45
Granodiorite
1976 constants
Patton et al, 1975, Silberman and Hopkins, 1976, Wittbrodt et al, 1989
71AMm50
Tuff
Patton et al, 1975, 1976, Silberman and Hopkins, 1976, Wittbrodt et al, 1989
71APa10
Patton et al, 1975,1976, Silberman and Hopkins, 1976, Wittbrodt et al, 1989
71APa15
Patton et al, 1975, 1976, Silberman and Hopkins, 1976, Wittbrodt
73AHr1
Mt. Oratio
Wilson and Smith, 1976, Wilson, 1977, Hoare and Coonrad, 1978, Frost et al, 1988
Nushagak Bay
74ACd14d
Diabase
Biotite diabase
Hoare and Coonrad, 1978, Box, 1985a
Hagemeister Is.
74AHr111
Gabbro
Downdraft Mountain
Wilson, 1977, Hoare and Coonrad, 1978, Box, 1985a
74AHr112
Matogak pluton, minimum age
74AHr118
Quartz monzonite
Wilson and Smith, 1976, Wilson, 1977, Hoare and Coonrad, 1978
74AHr26
Rhyodacite
Nunavachak Hills, sill
74AHr51
Monzonite
Pyroxene monzonite, Kulukak pluton
74AHr77
Togiak River Valley basalt, corrected age, age rounded from 0.758
Hoare and Coonrad, 1978, 1980, Box, 1985a
74B57
Granite
75AFS-12k
Garnet amphibolite.
75AFS-18ak
Gneiss
Biotite-muscovite granodiorite gneiss
Muscovite
75AFS-18ck
Biotite-bearing amphibolite
75AFS-1k
Biotite-muscovite gneiss
75AFS-22ak
Biotite-hornblende diorite gneiss.  Replicate analyses, 183.9+/-19.3 average age, biotite K2O very low
Biotite-hornblende diorite gneiss
75AFS-23ak
75AFS-28ak
Biotite-hornblende biotite gneiss.
75AFS-35ak
Biotite-hornblende granodiorite, part of Kanektok metamorphic complex, is this metamorphic?
75AFS-3k
Epidote amphibolite
Impure biotite
8106301
Globerman, 1985
Hagemeister Island
8107126
Basaltic andesite
Globerman, 1985, Box, 1985a
8107131
81SB-35b
Box, 1985a
81SB107A
Phyllite
Mica
Box, 1985a,b
81SB116b
Hornfels
Amphibole
Contact diabase
81SB133a
Schist
Mica schist
Box, 1985a, b
82BB147
Glaucophane hornblende epidote schist
Bethel
82JD 435A
Reifenstuhl, pers. comm., 1984, Moll, writ. comm., 1986; Robinson and Decker, 1986; Box and others, 1993
Plagioclase
Moll, written communication, 1986; Robinson and Decker, 1986; Box and others, 1993
82JD 450B
Rhyolite
86ASb 1
40/39?
Box and others, 1993
86ASb 9a
Olivine basalt
87ACz 61
87ACz 75M
Fission-track
Riebeckite
Alkali rhyolite
87AJm 271b
Diorite
87AJm 36a
40/39
Laser fusion analysis
87ATf 30
87ATf 51
87ATf 56
87ATf 62
87ATf 72
88AMl 12
Large error
88ASb 99a
Dacite
Dacite flow
88ML 22b
Apatite
Granite gneiss, Apatite cooling age
89AJm 34
Sandstone
Apatite cooling age
89ASb 101
89ASb 38
Nunivak Island
A1
Age recalculated with 1976 constants
Dalrymple et al, 1967, Cox and Dalrymple, 1967, Hoare et al, 1968
A101
Cox and Dalrymple, 1967, Hoare et al, 1968, Mankinen and Dalrymple, 1979
A102
A108
A11
Dalrymple et al, 1967
Cape Mendenhall
A114
AW
A12
A125
A126
Cox and Dalrymple, 1967, Hoare et al, 1968
A15
A17
A19
A2
A23
Hoare et al, 1968
A3
A35
A41
A45
Hoare et al, 1968, Mankinen and Dalrymple, 1979
A46
A48
A50
A51
A57
A59A
A6
A61
A69
A7
A70
A71
A74
A78
A8
A86
A88
Nanwaksjiak crater
A91
A96
A97
B78-1125G
Dike
B78-1133G
B78-1152G
B78-1171G
Near Aeolus Mtn.
B78-1213
Actinolite
Actinolite schist
DT75-60
DT75-61
Retrograded pyroxene granulite
Replicate analyses, 2271+/-70 average age
DT75-61r
DT75-62
DT75-63
Biotite granodiorite gneiss
DT75-64
Biotite-hornblende granodiorite gneiss
DT75-66
DT75-67
DT75-68
Biotite garnet amphibolite
DT75-69
40/39 Total Fusion
Garnet amphibolite.  Disturbed spectrum
DT75-70
Biotite quartz monzonite gneiss
40/39 total fusion
Biotite quartz monzonite gneiss.  Spectra suggests partial argon loss
DT75-71
Pyroxene granulite
Four replicate analyses, 2255+/-271.2 average age
DT75-71r2
DT75-71r3
DT75-71r4
DT75-72
Five replicate analyses, 2474+/-75 average age
40/39 Plateau
Five replicate conventional K-Ar analyses, 2474+/-75 average age
DT75-72r2
DT75-72r3
DT75-72r4
DT75-72r5
DT75-73
DT75-74
DT75-76
Garnet amphibolite.  Replicate analyses, 1049+/-32 average age
Garnet amphibolite.  Replicate conventional K-Ar analyses, 1049+/-32 average age; 40/39 plateau age 1.16 Ga.
DT75-76r
DT75-78
Greenschist
DT75-79
Biotite-epidote schist
DT75-81
Biotite-bearing greenschist
DT75-82
Biotite-hornblende diorite gneiss.  Replicate analyses, 214.2+/-6.3 average age reported.  Analytical data in error, wrong K2O reported for biotite.
DT75-82r
DT75-83
Biotite-hornblende diorite gneiss.  Analytical data is same as biotite for DT75-82, is suspicious and possibly in error.
DT76-21
Hornblende diorite
DT76-22
DT76-31
Biotite-muscovite gneiss.  Impure biotite
DT76-34
Biotite gneiss
DT76-36
Biotite-muscovite-quartz schist.  Impure biotite
Biotite-muscovite-quartz schist
DT76-39
Granodiorite gneiss
DT76-41
Biotite-hornblende epidote schist
DT76-42
DT76-46
Biotite-hornblende muscovite schist
DT76-52
Quartz muscovite gneiss
DT76-56
Biotite-muscovite-hornblende schist
DT76-57
DT76-58
DT76-61
Porphoblastic amphibolite
DT76-62
DT76-66
Unknown
Rock type not reported
DT76-69a
Garnet amphibolite.  Rerun of conventional K-Ar age
Paul Layer, written commun. 2006
DT76-70
Biotite amphibolite.  Rerun of conventional K-Ar age, shows disturbed spectra, indicating conventional age is suspect
Biotite amphibolite
DT76-70r
Biotite amphibolite.  Replicate rerun of conventional K-Ar age, shows disturbed spectra, indicating conventional age is suspect
DT76-71
Biotite-hornblende gneiss.  Minimum age
DT76-72
Metamorphic rock
Biotite-hornblende-epidote-plagioclase rock.  Minimum age
DT76-74
Biotite-hornblende-epidote rock
DT76-76
Pribilof Islands
G199
Silberman and Hopkins,1976, Hopkins and Silberman, 1978
Sericite
Silberman and Hopkins, 1976, Hopkins and Silberman, 1978
G200
K-feldspar
Chlorite
GA5-1310
Wilson and Smith, 1976, Wilson, 1977, Hoare and Coonrad, 1978, Box, 1985a
GA7-1450
Crater Hill
GB1-3156
GB7-1479a
GC1-1381
Tonalite - Quartz diorite
GC4-1300
Granite porphyry
GD1-3154
Mt. Waskey
GD5-1771
Sam Creek
Hoare and Coonrad, 1978
HD6-1453e
Red Mountain contact zone
HD6-2272a
ISOCHRON
Isochron
P10
St. George Island, 1976 constants
Cox et al, 1966, Cox, 1966
P11
St. George Island
Cox and Dalrymple, 1967, Mankinen and Dalrymple, 1979, Cox et al, 1966
P12
Cox and others, 1966, Cox and Dalrymple, 1967, Mankinen and Dalrymple, 1979
P13
P15
P19
P2
P20
P21
Cox and others, 1966; Cox and Dalrymple, 1967, Mankinen and Dalrymple, 1979
P3
P35
St. Paul Island.  Is age actually reported in abstract?
St. Paul Island, 0.125 my, Rush Hill flow.  Average age of multiple splits.
Cox et al, 1966, Cox, 1966, Mankinen and Dalrymple, 1979, Lee-Wong et al, 1979
St. Paul Island
P38
Cox and Dalrymple, 1967, Mankinen and Dalrymple, 1979
Cox and others, 1966, Cox, 1966
P5
Cox et al, 1966, Cox, 1966, Mankinen and Dalrymple, 1979
P52
P66
P67