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



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-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Aguirre and Lopez, unpublished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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