Gsa data Repository Compilation of ages of magmatic rocks in central Mexico



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RK 22 F

42 km SE of Durango, Dgo.

-104.50

23.87

Ignimbrite

K/Ar

Feld

31.40

0.70

McDowell & Keitzer, 1977

























RK 10 P

27 km S of Durango, Dgo.

-104.67

23.83

Ignimbrite

K/Ar

Pl

31.20

1.50

McDowell & Keitzer, 1977

























RK 17 F

Guadalupe Victoria dam, Dgo.

-104.75

23.96

Ignimbrite

K/Ar

Feld

31.20

0.70

McDowell & Keitzer, 1977

























*

Texcoco well, -1500

-99.00

19.40

Andesite

K/Ar

WR

31.10




Mooser et al. 1974

























*

Cuenca Libres-Oriental

-97.48

19.37

Sienite

K/Ar




31.00

1.90

Negendank et al. 1985





































Andesite

K/Ar

WR

31.00

3.00

IMP, UNPUBLISHED





































Tonalite

K/Ar

Bio

31.00

3.00

IMP, UNPUBLISHED





































Granite

K/Ar

Bio

31.00

2.00

IMP, UNPUBLISHED

























RK 20 F

7.5 km NW of Durango, Dgo.

-104.74

24.07

Ignimbrite

K/Ar

Feld

31.00

0.70

McDowell & Keitzer, 1977





































Granodiorite

K/Ar

Bio

31.00

3.00

IMP, UNPUBLISHED




























Stgo. Chazumba, Oax.







Ignimbrite

K/Ar




31.00




Moran-Zenteno et al. unpub.




























San Andres Lagunas, Oax.







Ignimbrite

K/Ar




31.00




Moran-Zenteno et al. unpub.

























AMC-05

La Sauceda, Gto.

-101.17

20.89

Rhyolite

K/Ar

San

30.80

0.80

Nieto-Samaniego et al., 1996

























AMC-08

N of Guanajuato, Gto.

-101.27

21.45

Rhyolite

K/Ar

San

30.70

0.80

Nieto-Samaniego et al., 1996

























JL-RD-A P

5 km NE of Durango, Dgo.

-104.65

24.63

Rhyolitic dike

K/Ar

Pl

30.70

0.70

McDowell & Keitzer, 1977

























RK 23 B

El Pino, Dgo.

-104.83

23.99

Rhyolite

K/Ar

Bio

30.70

0.50

McDowell & Keitzer, 1977

























TS 10

W of Huejuquilla, Jal.







Ignimbrite

Ar/Ar

San

28.70§

0.40

Ferrari et al., in preparation

























*

N of Sta. Maria del Rio, SLP

-100.68

21.90

Rhyodacite

K/Ar

WR

30.60

1.50

Labarthe-Hernandez et al., 1982

























2-71-1 F

Cerro de Mercado, Dgo.

-104.67

24.05

Ignimbrite

K/Ar

Feld

30.60

0.90

McDowell & Keitzer, 1977

























BV 17

Tilzapotla, Mor.

-99.24

18.49

Ignimbrite

K/Ar

Pl

30.50

1.10

Alba-Aldarve et al., 1996

























*

Texcoco well, -1500

-99.00

19.40

Andesite

K/Ar

WR

30.40

0.00

Mooser et al. 1974

























EN 162

SE Tula, Pach.

-99.24

19.98

Bas.-Andes. dike

K/Ar

WR

30.27

1.90

Jacobo-Albarrán, 1986

























AMC-06

NE of Santa Rosa, Gto.

-101.02

21.08

Rhyolite

K/Ar

San

30.10

0.80

Nieto-Samaniego et al., 1996

























*

Sierra de Carranco, SLP

-101.15

21.85

Rhyolite

K/Ar

WR

30.00

1.50

Labarthe-Hernandez et al., 1982

























GTO 74

Cañada la Virgen, Gto.







Andesite

K/Ar

WR

30.00

0.70

Cerca-Martínez, 1998

























RK 5 F

9 km S of Durango, Dgo.

-104.67

23.93

Ignimbrite

K/Ar

Feld

30.00

0.70

McDowell & Keitzer, 1977




























Yucudaac, Oax.

-97.55

17.68

Andesite

K/Ar

WR

30.00




Ferrusquia & McDowell, in press

























RK 6 F

La Ferreria, Dgo.

-104.67

23.95

Ignimbrite

K/Ar

Feld

29.90

0.70

McDowell & Keitzer, 1977

























JL BM LB R

Mesa Caleras, Dgo.

-104.22

24.53

Basalt

K/Ar

WR

29.80

0.60

McDowell & Keitzer, 1977

























*

Santa Maria del Rio, SLP.

-100.70

21.80

Ignimbrite

K/Ar

WR

29.50

1.50

Labarthe-Hernandez et al., 1982

























HP 10

N of San Ignacio, Sin.

-106.47

24.06

Andesitic dike

K/Ar

Hb

29.50

0.7

Henry & Fredrikson, 1987

























JL BR SI R

Mesa Caleras, Dgo.

-104.57

24.08

Basalt

K/Ar

WR

29.50


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