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



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gms

4.92

0.15

Moore et al., 1994

























ZHG JRE-9

Sierra de San Marcos, Jal.

-103.56

20.25

Ignimbrite

K/Ar

Bio

4.90

0.30

Rosas et al., 1997

























LIRT 3

Chiconquiaco-Palma Sola, Ver.

-96.62

19.76

Basalt alk.

K/Ar

WR

4.90

0.50

Lopez-Infanzon, 1990

























Ml 97

N Amacueca, Jal.

-103.60

20.06

Andesite

K/Ar

WR

4.89

0.30

Allan 1986

























6

Rio G. Santiago, Jal.

-103.33

20.76

Ignimbrite

K/Ar

WR

4.80

0.10

Watkins et al. 1971

























AG 89

Tirados, S. Los Agostinos, Gto.







Andesite

K/Ar

WR

4.80

0.30

Aguirre and Lopez, unpublished

























CHP 726b

S Tizapan el Alto, Jal.

-102.93

20.02

Andesite

K/Ar




4.79

0.59

Delgado G. H., 1992

























*N

Mesa Colorada, Jal.

-103.34

20.71

Ignimbrite

K/Ar




4.75

0.00

Soto and Ortega, 1982

























HU 20.5

Don Guinyo, Hgo.







Ignimbrite

Ar/Ar

gms

4.50§

0.40

Aguirre and Lopez, unpublished

























KA 3046

S. Gaspar, Jal.

-103.27

20.78

Ignimbrite

K/Ar




4.71

0.07

Gilbert et al. 1985

























7

Rio G. Santiago, Jal.

-103.33

20.76

Basalt

K/Ar

WR

4.70

0.10

Watkins et al. 1971

























Am 84

W Amealco caldera, Qro.

-100.45

20.17

Ignimbrite

K/Ar

Feld

4.70

0.19

Aguirre, 1997

























AG 88

Tirados, Gto.







Ignimbrite

K/Ar

glass

4.70

0.15

Aguirre and Lopez, unpublished

























Ped Jal 21

Achio, Jal.

-103.71

20.88

Ignimbrite a Ho

K/Ar

Pl

4.69

0.17

Nieto-Obregón et al. 1985

























B116

S Sayula, Jal.

-103.65

19.86

Ankaratite

K/Ar

Phl

4.69

0.05

Allan 1986

























Ped Jal 8

Ixtlahuacan del Rio, Jal.

-103.24

20.87

Ignimbrite

K/Ar

An

4.68

0.11

Nieto-Obregón et al. 1981

























Am 22

Amealco caldera, Qro.

-100.30

20.13

Ignimbrite

K/Ar

glass

4.68

0.10

Aguirre, 1997

























Al 11

N Amacueca, Jal.

-103.61

20.05

Basalt

K/Ar

WR

4.65

0.05

Allan 1986

























CHP 106

San Marcos, Jal.

-103.53

20.33

Andesite

K/Ar

WR

4.64

0.68

Delgado et al., 1995

























GD-6

E of La Coronilla (RGS), Jal.

-103.28

20.75

Alk.-Basalt

K/Ar

gms

4.60

0.13

Moore et al., 1994

























284

E S. Maria Oro, Nay.

-104.56

21.31

Rhyolite

K/Ar

Feld

4.60

0.20

Gastil et al. 1979

























C 69

Zacoalco, Jal.

-103.58

20.21

Andesite

K/Ar

WR

4.60

0.10

Allan 1986

























CHP 705

Toluquilla, S Citala, Jal.

-103.24

20.01

Alk. Bas.-And.

K/Ar

WR

4.58

1.07

Delgado et al., 1995

























C 91

E Atemajac, Jal.

-103.58

20.08

Alk.-Andesite

K/Ar

WR

4.56

0.04

Allan 1986

























505

E Tapalpa, Jal.

-103.61

19.83

Dacite

K/Ar

Hb

4.56

0.01

Allan 1986

























AZ 148

La Virgen, Gto.

-100.57

20.00

Ignimbrite

K/Ar

WR

4.50

0.10

Pradal and Robin, 1994

























CHP 169

El Picacho, Jal.

-103.19

20.13

Basalt

K/Ar

WR

4.48

0.69

Delgado et al., 1995

























A 45

S Zacoalco, Jal.

-103.55

20.11

Lamprophyre

K/Ar

WR

4.42

0.03

Allan 1986

























ZHG JRE-8

Sierra de Tapalpa, Jal.

-103.90

20.32

Andesite

K/Ar

WR

4.40

0.20

Rosas et al., 1997

























LI 104

Chiconquiaco-Palma Sola, Ver.

-96.75

19.67

Trachy-basalt

K/Ar

WR

4.40

0.30

Lopez-Infanzon, 1990

























KA 4288r

RGS Huentitan, Jal.

-103.31

20.78

Basalt

K/Ar

WR

4.40

0.30

Gilbert et al. 1985

























EN 41

E Amealco, Qro.

-99.99

20.21

Andesite

K/Ar

WR

4.36

0.30

Jacobo-Albarrán, 1986

























Cl 3

E Atemajac, Jal.

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