|
|
|
|
|
|
KA 3076
|
N La Primavera, Jal.
|
-103.55
|
20.81
|
Air-fall pumice
|
K/Ar
|
|
3.07
|
0.10
|
Gilbert et al. 1985
|
|
|
|
|
|
|
|
|
101
|
Atenguillo, Jal.
|
-104.53
|
20.33
|
Lamprophire
|
K/Ar
|
|
3.04
|
0.12
|
Wallace & Carmichael, 1989
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
3.00
|
0.20
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
N-2
|
Pajacuaran, Mich.
|
-102.56
|
20.10
|
Andesite
|
K/Ar
|
WR
|
3.00
|
0.30
|
Rosas et al., 1989
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
3.00
|
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
3.00
|
0.20
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
3.00
|
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
N La Primavera, Jal.
|
-103.56
|
20.80
|
Rhyolite
|
K/Ar
|
|
2.94
|
|
CFE 1980
|
|
|
|
|
|
|
|
|
Am 122
|
El Rincon, Amealco, Qro
|
-100.23
|
20.23
|
Rhyolite
|
K/Ar
|
glass
|
2.92
|
0.59
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
113
|
Atenguillo, Jal.
|
-104.57
|
20.26
|
Lamprophire
|
K/Ar
|
|
2.90
|
0.15
|
Wallace & Carmichael, 1989
|
|
|
|
|
|
|
|
|
Mex 138
|
NE Tendeparacua, Mich.
|
-101.40
|
19.90
|
Porphyric Andesite
|
K/Ar
|
WR
|
2.90
|
0.12
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
Hz 15
|
Zitacuaro area, Mich.
|
-100.49
|
19.58
|
Dacite
|
K/Ar
|
Gms
|
2.90
|
0.60
|
CFE, 1992b
|
|
|
|
|
|
|
|
|
KR-110
|
C. Agua Zarca, Jal.
|
-104.53
|
20.63
|
Andesite
|
K/Ar
|
Gms
|
2.89
|
0.07
|
Righter & Carmichael, 1992
|
|
|
|
|
|
|
|
|
154
|
Atenguillo, Jal.
|
-104.50
|
20.42
|
Lamprophire
|
K/Ar
|
|
2.87
|
0.11
|
Wallace & Carmichael, 1989
|
|
|
|
|
|
|
|
|
ZHG JRE-2
|
Sierra de Ahuisculco, Jal.
|
-103.05
|
20.05
|
Ignimbrite
|
K/Ar
|
Pl
|
2.80
|
0.10
|
Rosas et al., 1997
|
|
|
|
|
|
|
|
|
Mor 4
|
La Soledad, Gto.
|
-101.21
|
20.10
|
Ignimbrite
|
K/Ar
|
San
|
2.80
|
0.20
|
Ferrari et al., 1991
|
|
|
|
|
|
|
|
|
Ped Jal 3
|
El Sombrero, Jal.
|
-104.10
|
21.13
|
Alk.-Bas.
|
K/Ar
|
WR
|
2.80
|
0.10
|
Damon et al. 1979
|
|
|
|
|
|
|
|
|
166
|
Atenguillo, Jal.
|
-104.48
|
20.32
|
Lamprophire
|
K/Ar
|
|
2.78
|
0.16
|
Wallace & Carmichael, 1989
|
|
|
|
|
|
|
|
|
A555
|
Sta. Teresa, Gto.
|
-100.98
|
20.48
|
Basalt
|
K/Ar
|
WR
|
2.78
|
0.70
|
Hasenaka and Carmichael 1985
|
|
|
|
|
|
|
|
|
KR-260
|
C. El Vigia (Atenguillo), Jal.
|
-104.57
|
20.67
|
Alk.-Basalt
|
K/Ar
|
gms
|
2.74
|
0.16
|
Righter & Carmichael, 1992
|
|
|
|
|
|
|
|
|
LI 204
|
Chiconquiaco-Palma Sola, Ver.
|
-96.87
|
19.75
|
Trachy-dacite
|
K/Ar
|
WR
|
2.70
|
0.30
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
LI 111
|
Chiconquiaco-Palma Sola, Ver.
|
-96.79
|
19.69
|
Basanite
|
K/Ar
|
WR
|
2.70
|
0.28
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
LTX-30
|
Plateau La Azufrera, Ver.
|
-95.13
|
18.20
|
Alk.-Basalt
|
K/Ar
|
|
2.70
|
0.15
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
KR-259
|
C. El Vigia (Atenguillo), Jal.
|
-104.57
|
20.67
|
Alk.-Basalt
|
K/Ar
|
gms
|
2.69
|
0.18
|
Righter & Carmichael, 1992
|
|
|
|
|
|
|
|
|
881
|
Cerro Alto, Mich.
|
-102.49
|
19.98
|
Andesite
|
K/Ar
|
WR
|
2.60
|
0.10
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
LTX-77
|
Volc. La Azufrera, Ver.
|
-94.90
|
18.35
|
Alk.-Basalt
|
K/Ar
|
|
2.60
|
0.13
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
PH 62
|
Atotonilco, N Pach.
|
-98.63
|
20.63
|
Bas.-Andesite
|
K/Ar
|
WR
|
2.56
|
0.00
|
Cantagrel et al. 1979
|
|
|
|
|
|
|
|
|
Am 18
|
Garabato, Amealco, Qro.
|
-100.19
|
20.10
|
Andesite
|
K/Ar
|
WR
|
2.54
|
0.26
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
CHP 504
|
SW Ocotlan, Jal.
|
-102.85
|
20.31
|
Andesite
|
K/Ar
|
WR
|
2.52
|
0.37
|
Delgado G. H., 1992
|
|
|
|
|
|
|
|
|
Ped Jal 20
|
Mesa S. Rosa, Jal.
|
-103.73
|
20.91
|
Basalt
|
K/Ar
|
WR
|
2.50
|
0.06
|
Nieto-Obregón et al. 1985
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
2.50
|
0.20
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
155
|
Atenguillo, Jal.
|
-104.51
|
20.41
|
Lamprophire
|
K/Ar
|
|
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