-103.58
20.08
|
Andesite
|
K/Ar
|
WR
|
4.35
|
0.06
|
Allan 1986
|
|
|
|
|
|
|
|
|
Ped Jal 26
|
S. El Travesano, Jal.
|
-103.19
|
20.33
|
Basalt
|
K/Ar
|
WR
|
4.33
|
0.09
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
*
|
La Lumbre, Palma Sola, Ver.
|
-96.50
|
19.75
|
Bas.-Andesite
|
K/Ar
|
WR
|
4.31
|
0.80
|
Negendank et al. 1985
|
|
|
|
|
|
|
|
|
Am 58
|
Rim domes Amealco cald. Qro.
|
-100.15
|
20.17
|
Andesite
|
K/Ar
|
WR
|
4.31
|
0.12
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
Am 79
|
La Campana, Amealco, Qro.
|
-100.25
|
20.17
|
Dacite
|
K/Ar
|
glass
|
4.31
|
0.10
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
*
|
Huichapan, Pach.
|
-99.50
|
20.36
|
Ignimbrite
|
K/Ar
|
|
4.30
|
0.30
|
Milan and Herrera 1987
|
|
|
|
|
|
|
|
|
ZHG JRE-6
|
Sierra de Tapalpa, Jal.
|
-103.68
|
20.25
|
Andesite
|
K/Ar
|
WR
|
4.30
|
0.30
|
Rosas et al., 1997
|
|
|
|
|
|
|
|
|
LI 300
|
Chiconquiaco-Palma Sola, Ver.
|
-96.80
|
19.80
|
Basalt alk.
|
K/Ar
|
WR
|
4.30
|
0.30
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
Mx 88-28
|
El Dorado, Mich.
|
-100.47
|
19.63
|
Dacite
|
K/Ar
|
Bio
|
4.30
|
0.40
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
231
|
RGS Morrajas, Jal.
|
-104.53
|
21.45
|
Basalt
|
K/Ar
|
Pl
|
4.30
|
1.70
|
Gastil et al. 1979
|
|
|
|
|
|
|
|
|
Al 38
|
S Sayula, Jal.
|
-103.61
|
19.83
|
Lamprophyre
|
K/Ar
|
gms
|
4.28
|
0.20
|
Allan 1986
|
|
|
|
|
|
|
|
|
B 60
|
E Cd. Guzman, Jal.
|
-103.40
|
19.70
|
Lamprophyre
|
K/Ar
|
Phl
|
4.28
|
0.02
|
Allan 1986
|
|
|
|
|
|
|
|
|
Cl 45
|
W Sayula, Jal.
|
-103.63
|
19.90
|
Lamprophyre
|
K/Ar
|
WR
|
4.24
|
0.11
|
Allan 1986
|
|
|
|
|
|
|
|
|
Mas801b
|
N Jala, Nay.
|
-104.42
|
21.11
|
Ignimbrite
|
Ar/Ar
|
San
|
4.23
|
0.02
|
Righter et al., 1995
|
|
|
|
|
|
|
|
|
Cl 41
|
W Sayula, Jal.
|
-103.63
|
19.90
|
Lamprophyre
|
K/Ar
|
Phl
|
4.21
|
0.07
|
Allan 1986
|
|
|
|
|
|
|
|
|
*
|
Huichapan, Hgo.
|
-99.50
|
20.36
|
Ignimbrite
|
K/Ar
|
|
4.20
|
0.30
|
Milan and Herrera 1987
|
|
|
|
|
|
|
|
|
Cl 40
|
W Sayula, Jal.
|
-103.63
|
19.90
|
Lamprophyre
|
K/Ar
|
WR
|
4.20
|
0.03
|
Allan 1986
|
|
|
|
|
|
|
|
|
HU 8
|
Volcán Nopala, Hgo.
|
|
|
Andesite
|
Ar/Ar
|
WR
|
2.70§
|
0.20
|
Aguirre and Lopez, unpublished
|
|
|
|
|
|
|
|
|
CHP 092
|
Cerro El Patomo, Jal.
|
-103.44
|
20.45
|
Andesite
|
K/Ar
|
|
4.19
|
0.69
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
A 60
|
E Sayula L., Jal.
|
-103.41
|
20.05
|
Lamprophyre
|
K/Ar
|
WR
|
4.16
|
0.04
|
Allan 1986
|
|
|
|
|
|
|
|
|
CHP 551
|
S Tuxcueca, S Chapala lake
|
-103.18
|
20.10
|
Alk. Bas.-And.
|
K/Ar
|
WR
|
4.12
|
0.64
|
Delgado G. H., 1992
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
4.00
|
0.40
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
LI 1
|
Chiconquiaco-Palma Sola
|
-96.81
|
19.67
|
Basalt alk.
|
K/Ar
|
WR
|
4.00
|
0.40
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
Ped Jal 24
|
Mesa Mistemeque, Jal.
|
-103.72
|
20.96
|
Basalt
|
K/Ar
|
WR
|
3.97
|
0.09
|
Nieto-Obregón et al. 1985
|
|
|
|
|
|
|
|
|
SK 259
|
S. Fr. Ixcatán, Jal.
|
-103.25
|
20.85
|
Basalt
|
K/Ar
|
|
3.97
|
0.10
|
Gilbert et al. 1985
|
|
|
|
|
|
|
|
|
Am 41b
|
Las Palomas, Amealco, Qro.
|
-100.27
|
20.15
|
Andesite
|
K/Ar
|
gms
|
3.96
|
0.40
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
Am 63
|
La Cruz, Amealco, Qro.
|
-100.17
|
20.17
|
Rhyolite
|
K/Ar
|
Feld
|
3.90
|
0.14
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
KR 308
|
NE Guayabitos, Nay.
|
-105.20
|
21.07
|
Basalt
|
Ar/Ar
|
WR
|
3.88
|
0.03
|
Righter et al., 1995
|
|
|
|
|
|
|
|
|
CHP 535
|
W Cajititlan lake, Jal.
|
-103.43
|
20.43
|
Andesite
|
K/Ar
|
WR
|
3.86
|
0.65
|
Delgado, 1991
|
|
|
|
|
|
|
|
|
CHP 601b
|
NW Chapala, Jal.
|
-103.27
|
20.33
|
Andesite
|
K/Ar
|
WR
|
3.85
|
0.42
|
Delgado, 1991
|
|
|
|
|
|
|
|
|
LI 107
|
Chiconquiaco-Palma Sola
|
-96.76
|
19.65
|
Basalt alk.
|
K/Ar
|
WR
|
3.80
|
0.40
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
Mx 88-22
|
Sabanilla, W Amealco, Qro.
|
-100.80
|
20.36
|
Ignimbrite
|
K/Ar
|
Pl
|
3.80
|
0.40
|
Ferrari et al. 1991
|
|
|
|
|
|
|
|
| |
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