|
|
Basalt
|
K/Ar
|
WR
|
16.00
|
0.13
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
369
|
SW Tepic
|
-105.01
|
21.31
|
Basalt
|
K/Ar
|
Pl
|
16.00
|
0.70
|
Gastil et al. 1979
|
|
|
|
|
|
|
|
|
Hz 20
|
Zitacuaro, Mich.
|
-100.20
|
19.47
|
Andesite
|
K/Ar
|
gms
|
16.00
|
1.00
|
CFE, 1992b
|
|
|
|
|
|
|
|
|
PEDHI 20-81
|
Puerto La Estancia, Hgo.
|
-99.32
|
20.80
|
Vitric tuff
|
K/Ar
|
San
|
15.70
|
0.40
|
Suter et al., 1997
|
|
|
|
|
|
|
|
|
Ped Jal 13
|
Los Camachos, Rio Verde Jal.
|
-102.92
|
20.83
|
Ignimbrite
|
K/Ar
|
San
|
15.30
|
0.32
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
Mas 712
|
Santa Rosa dam, Jal.
|
-103.71
|
20.91
|
Ignimbrite gouge
|
K/Ar
|
gouge
|
15.20
|
2.50
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
*
|
Sierra de Guadalupe, DF
|
-99.08
|
19.62
|
Andesite
|
K/Ar
|
WR
|
15.00
|
0.80
|
Mooser et al. 1974
|
|
|
|
|
|
|
|
|
Nucleo 6
|
Tulyehualco 1 well, D.F. -1130
|
-99.02
|
19.27
|
Andesite
|
K/Ar
|
WR
|
15.00
|
0.70
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
|
Laollaga, Oax.
|
-95.25
|
16.38
|
Ignimbrite
|
K/Ar
|
|
15.00
|
|
Ferrusquia & McDowell, in press
|
|
|
|
|
|
|
|
|
PHA 85
|
Cerro Los Picachos, Nay.
|
-104.73
|
21.72
|
Andesite
|
K/Ar
|
WR
|
14.70
|
0.70
|
Rodriguez-C. and Rodriguez-T., 1992
|
|
|
|
|
|
|
|
|
EN 39
|
E S.Juan del Rio, Hgo.
|
-99.85
|
20.35
|
Andesite
|
K/Ar
|
WR
|
14.70
|
0.70
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
EN 199
|
Sierra de Guadalupe, DF
|
-99.10
|
19.58
|
Andesite
|
K/Ar
|
WR
|
14.56
|
0.70
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
Mas 714
|
Santa Rosa dam, Jal.
|
-103.71
|
20.91
|
Ignimbrite gouge
|
K/Ar
|
gouge
|
14.50
|
0.40
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
|
Tlacolula, Oax.
|
-96.42
|
16.88
|
Ignimbrite
|
K/Ar
|
Pl + Bio
|
14.50
|
|
Ferrusquia & McDowell, unpub.
|
|
|
|
|
|
|
|
|
|
Ixtapa, Oax.
|
|
|
Ignimbrite
|
K/Ar
|
|
14.40
|
|
Ferrusquia & McDowell, unpub.
|
|
|
|
|
|
|
|
|
EN 168
|
Chapa de Mota, Mex.
|
-99.52
|
19.72
|
Basalt
|
K/Ar
|
WR
|
14.26
|
1.50
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
*
|
Sierra de Guadalupe, DF
|
-99.09
|
19.60
|
Basalt
|
K/Ar
|
WR
|
14.20
|
0.70
|
Mooser et al. 1974
|
|
|
|
|
|
|
|
|
Ls 23
|
Las Trojes, Mich.
|
-100.91
|
19.65
|
Andesite
|
K/Ar
|
WR
|
14.10
|
0.70
|
Nixon et al., 1987
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
14.00
|
1.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
14.00
|
1.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
*
|
Cuenca Libres-Oriental, Pue.
|
-97.13
|
19.70
|
Granodiorite
|
K/Ar
|
|
14.00
|
0.00
|
Yanez-G. and Garcia-D. 1980
|
|
|
|
|
|
|
|
|
LIRT 32
|
Chiconquiaco-Palma Sola, Ver.
|
-96.76
|
19.67
|
Alk.-basalt
|
K/Ar
|
WR
|
14.00
|
1.00
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
Pl
|
14.00
|
1.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
Ve 71b
|
Palma Sola Massif, Ver.
|
-96.40
|
19.71
|
Alk.-Basalt
|
K/Ar
|
WR
|
14.00
|
0.50
|
Cantagrel et al. 1979
|
|
|
|
|
|
|
|
|
Mx 88-32
|
NW di Caracuaro, Mich.
|
-101.27
|
19.05
|
Dacite
|
K/Ar
|
Amph
|
13.90
|
0.70
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
188
|
Em. Zapata, Nay.
|
-104.90
|
21.20
|
Basalt
|
K/Ar
|
Pl
|
13.80
|
3.10
|
Gastil et al. 1979
|
|
|
|
|
|
|
|
|
EN 17
|
NNW Tula, Hgo.
|
-99.47
|
20.23
|
Andesite
|
K/Ar
|
WR
|
13.78
|
0.70
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
13.70
|
0.80
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
EN 123
|
E Copandaro, Mich.
|
-101.14
|
19.91
|
Andesite
|
K/Ar
|
WR
|
13.66
|
1.90
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
RGS 12
|
S. Rosa, Jal.
|
-103.70
|
20.90
|
Ignimbrite
|
K/Ar
|
San
|
13.60
|
0.10
|
Nieto-Obregón et al. 1985
|
|
|
|
|
|
|
|
|
EN 167
|
Chapa de Mota, Mex.
|
-99.51
|
19.71
|
Andesite
|
K/Ar
|
WR
|
13.57
|
0.60
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
DCH 8
|
Atotonilco el alto, Jal.
|
-102.42
|
20.52
|
Basalto
|
K/Ar
|
WR
|
13.50
|
1.30
|
Castillo-Hdz. and Romero-Rios, 1991
|
|
|
|
|
|
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