0.60
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
|
Llano de Lobos, Oax.
|
|
|
Ignimbrite
|
K/Ar
|
WR
|
29.50
|
|
Ferrusquia & McDowell, unpub.
|
|
|
|
|
|
|
|
|
JAG 1
|
Casas Tepetate, SLP
|
-101.27
|
22.04
|
Rhyolite
|
K/Ar
|
Bio
|
29.20
|
0.80
|
Aguillon-Robles et al., 1994
|
|
|
|
|
|
|
|
|
RK 14 F
|
Rio Mimbres, Dgo.
|
-104.95
|
23.90
|
Ignimbrite
|
K/Ar
|
Feld
|
29.20
|
0.70
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
Ped Zac 3
|
Cerro Caballos, Zac.
|
-103.18
|
21.77
|
Ignimbrite
|
K/Ar
|
San
|
29.15
|
0.60
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
2-71-2 F
|
Rio Mimbres, Dgo.
|
-104.97
|
23.89
|
Ignimbrite
|
K/Ar
|
Feld
|
29.10
|
0.60
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
*
|
La Cantera, SLP
|
-101.03
|
21.91
|
Ignimbrite
|
K/Ar
|
WR
|
29.00
|
1.50
|
Labarthe-Hernandez et al., 1982
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
29.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
Stgo. Yuquita, Oax.
|
|
|
Ignimbrite
|
K/Ar
|
San
|
29.00
|
|
Moran-Zenteno et al. unpub.
|
|
|
|
|
|
|
|
|
EN 3
|
B. Juarez, Hgo.
|
-99.15
|
19.32
|
Basalt
|
K/Ar
|
WR
|
28.94
|
1.00
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
3-71-1 F
|
Rio Mimbres, Dgo.
|
-104.97
|
23.89
|
Ignimbrite
|
K/Ar
|
Feld
|
28.90
|
0.60
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
RK 15 F
|
El Soldado, Dgo.
|
-104.95
|
23.90
|
Ignimbrite
|
K/Ar
|
Feld
|
28.80
|
1.10
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
RK 2 F
|
Cerro Garavito, Dgo.
|
-104.77
|
23.97
|
Ignimbrite
|
K/Ar
|
Feld
|
28.70
|
0.60
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
AMC-07
|
N of S. Miguel Allende, Gto.
|
-100.87
|
20.87
|
Ignimbrite
|
K/Ar
|
San
|
28.60
|
0.70
|
Nieto-Samaniego et al., 1996
|
|
|
|
|
|
|
|
|
EN 178
|
South of Zitacuaro, Mich.
|
-100.26
|
19.10
|
Latite
|
K/Ar
|
WR
|
28.60
|
3.00
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
JL 1 R
|
Mesa Caleras, Dgo.
|
-104.59
|
24.12
|
Basalt
|
K/Ar
|
WR
|
28.60
|
0.50
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
RK 11 F
|
Rio Chico, Dgo.
|
-104.87
|
23.92
|
Ignimbrite
|
K/Ar
|
Feld
|
28.60
|
0.60
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
RK 1 F
|
Rio Chico, Dgo.
|
-104.88
|
23.93
|
Ignimbrite
|
K/Ar
|
Feld
|
28.50
|
1.50
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
3-71-10
|
Coyotitan, Sin.
|
-106.55
|
23.80
|
Ignimbrite
|
K/Ar
|
Bio
|
28.30
|
0.70
|
Henry & Fredrikson, 1987
|
|
|
|
|
|
|
|
|
RK 3 F
|
15 km S of Durango, Dgo.
|
-104.67
|
23.92
|
Ignimbrite
|
K/Ar
|
Feld
|
28.30
|
0.60
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
RK 4 P
|
16 km S of Durango, Dgo.
|
-104.67
|
23.83
|
Ignimbrite
|
K/Ar
|
Pl
|
28.30
|
0.60
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
AMC-01
|
N of Leon, Gto.
|
-101.53
|
21.33
|
Ignimbrite
|
K/Ar
|
San
|
28.20
|
0.70
|
Nieto-Samaniego et al., 1996
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
28.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
|
|
Granite
|
K/Ar
|
Bio
|
28.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
PedJal 16
|
Mesa El Mirador, Zac.
|
-102.77
|
21.07
|
Ignimbrite
|
K/Ar
|
Pl
|
28.00
|
1.20
|
Nieto-Obregón et al. 1981
|
|
|
|
|
|
|
|
|
|
|
|
|
Ignimbrite
|
K/Ar
|
San
|
28.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
1-70-1 B
|
Las Adjuntas, Dgo.
|
-105.50
|
23.74
|
Rhyolite
|
K/Ar
|
Bio
|
27.90
|
0.40
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
4-22-71 B
|
Las Adjuntas, Dgo.
|
-105.45
|
23.74
|
Rhyolite
|
K/Ar
|
Bio
|
27.70
|
0.40
|
McDowell & Keitzer, 1977
|
|
|
|
|
|
|
|
|
SS-149
|
Sierra de Valdecañas, Zac.
|
-102.93
|
23.06
|
Ignimbrite
|
K/Ar
|
WR
|
27.70
|
0.60
|
Lang, 1988
|
|
|
|
|
|
|
|
|
SS-227
|
Sierra de Valdecañas, Zac.
|
-102.94
|
23.12
|
Ignimbrite
|
K/Ar
|
WR
|
27.50
|
1.20
|
Lang, 1988
|
|
|
|
|
|
|
|
|
IL 89 5
|
S of Teul, Zac.
|
-103.48
|
21.42
|
Ignimbrite
|
K/Ar
|
San
|
27.11
|
0.05
|
Moore et al., 1994
|
|
|
|
|
|
|
|
|
|
|
|
|
Tonalite
|
K/Ar
|
Bio
|
27.00
|
2.00
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
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