|
|
3-71-9 P
|
W of El Palmito, Dgo.
|
-105.85
|
23.55
|
Ignimbrite
|
K/Ar
|
Pl
|
23.30
|
0.40
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
23.30
|
1.50
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
Ped Jal 1
|
La Carbonera, Bolaños, Jal.
|
-103.70
|
21.86
|
Ignimbrite
|
K/Ar
|
Pl
|
23.23
|
0.52
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
3-71-2 F
|
SE of El Salto, Dgo.
|
-105.32
|
23.75
|
Ignimbrite
|
K/Ar
|
Feld
|
23.20
|
0.50
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
3-71-8 F
|
Espinazo del Diablo, Dgo.
|
-105.77
|
23.64
|
Ignimbrite
|
K/Ar
|
Feld
|
23.10
|
0.50
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
3-71-7 P
|
SW of Espinazo del Diablo, Dgo.
|
-105.80
|
23.63
|
Ignimbrite
|
K/Ar
|
Pl
|
23.00
|
0.50
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
|
|
-101.68
|
22.45
|
Rhyolite
|
K/Ar
|
San
|
23.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
Mx 88-38
|
Misterio del Chorro, Gto.
|
-101.22
|
20.93
|
Rhyolite
|
K/Ar
|
San
|
23.00
|
1.00
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
|
|
-102.46
|
20.70
|
Rhyolite
|
K/Ar
|
Pl
|
23.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
IL 89 1
|
N of El Tambor, Zac.
|
-103.47
|
21.28
|
Ignimbrite
|
Ar/Ar
|
San
|
22.99
|
0.05
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
IL 89 10
|
El Tambor, Zac.
|
-103.47
|
21.27
|
Ignimbrite
|
Ar/Ar
|
San
|
22.92
|
0.05
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
IL 89 12
|
El Tambor, Zac.
|
-103.47
|
21.27
|
Ignimbrite
|
Ar/Ar
|
San
|
22.92
|
0.05
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
1-70-2 P
|
E of Espinazo del Diablo, Dgo.
|
-105.75
|
23.66
|
Ignimbrite
|
K/Ar
|
Pl
|
22.90
|
0.50
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
TS 21
|
Jesus Maria, Nay.
|
|
|
Andesite
|
Ar/Ar
|
Pl
|
22.60
|
0.30
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
Ped Jal 19
|
S. Pedro Analco, Jal.
|
-103.95
|
21.13
|
Latite
|
K/Ar
|
Pl
|
22.54
|
0.47
|
Nieto-Obregón et al. 1985
|
|
|
|
|
|
|
|
|
*A
|
El Casco, Nay.
|
-104.80
|
21.78
|
Andesitic tuff
|
K/Ar
|
|
22.40
|
4.00
|
Soto and Ortega, 1982
|
|
|
|
|
|
|
|
|
TS 26
|
W of Mesa del Nayar, Nay.
|
|
|
Ignimbrite
|
Ar/Ar
|
San
|
22.40
|
0.50
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
R 14
|
Nazas, Dur.
|
-104.49
|
25.12
|
Alk. Basalt
|
K/Ar
|
WR
|
22.40
|
0.4
|
Aguirre & McDoweell, 1993
|
|
|
|
|
|
|
|
|
HM 1
|
El Roble, Sin.
|
-106.38
|
23.22
|
Dacite
|
K/Ar
|
Bio
|
22.30
|
0.30
|
Henry & Fredrikson, 1987
|
|
|
|
|
|
|
|
|
Ped Jal 4
|
W Bolanos, Jal.
|
-103.70
|
21.86
|
Ignimbrite
|
K/Ar
|
San
|
22.23
|
0.46
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
Na 55 a
|
Nazas, Dur.
|
-104.20
|
25.19
|
Alk. Basalt
|
K/Ar
|
WR
|
22.10
|
0.4
|
Aguirre & McDoweell, 1993
|
|
|
|
|
|
|
|
|
|
|
|
|
Rhyolite
|
K/Ar
|
San
|
22.00
|
4.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
Mx 88-41
|
S. Jose Los Allende, Gto.
|
-101.02
|
20.87
|
Ignimbrite
|
K/Ar
|
San
|
22.00
|
1.00
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
|
|
|
|
Porfido dacitico
|
K/Ar
|
WR
|
22.00
|
1.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
A 60
|
C. San Vicente, Teul, Zac.
|
-103.38
|
21.55
|
Bas.-Andesite
|
K/Ar
|
gms
|
21.81
|
1.04
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
21.70
|
1.30
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
UAKA 82-02
|
Corral Blanco, Bolanos, Zac.
|
-103.87
|
21.62
|
Ignimbrite
|
K/Ar
|
Bio
|
21.30
|
0.50
|
Scheubel et al., 1988
|
|
|
|
|
|
|
|
|
246
|
S S. Maria Oro, Nay.
|
-104.53
|
21.29
|
Rhyolite
|
K/Ar
|
Pl
|
21.30
|
0.90
|
Gastil et al. 1979
|
|
|
|
|
|
|
|
|
Ped Jal 6
|
San Martin Bolanos, Jal.
|
-103.70
|
21.86
|
Basaltic dike
|
K/Ar
|
WR
|
21.03
|
0.44
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
Mx 88-2
|
P.to La Sosa, Mich.
|
-101.13
|
19.51
|
Ignimbrite
|
K/Ar
|
San
|
21.00
|
1.00
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
W4
|
C. las Tetillas, Jal.
|
-103.47
|
21.32
|
Andesite
|
K/Ar
|
WR
|
21.00
|
1.00
|
Castillo-Hdz. and Romero-Rios, 1991
|
|
|
|
|
|
|
|
|
Ped Jal 10
|
C. El Mexicano, Jal.
|
-103.23
|
21.12
|
Basalt
|
K/Ar
|
WR
|
20.89
|
|
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