Vol. 40 No. 4 (2001): October 1, 2001

Article

• Geophysical characterization of the Etla Valley aquifer, Oaxaca, Mexico

  E. L. Flores-Márquez, R. E. Chávez, R. G. Martínez-Serrano, J. Herrera-Barrientos, A. Tejero-Andrade, S. Belmonte

  245-257

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• K-Ar ages of four mafic lavas from the Central Jalisco Volcanic Lineament: Supporting evidence for a NW migration of volcanism within the Jalisco block, western Mexico

  William L. Bandy, Jaime Urrutia-Fucugauchi, Fred W. McDowell, Ofelia Morton-Bermea

  259-269

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• Occam and Bostick 1-D inversion of magnetotelluric soundings in he Chicxulub Impact Crater, Yucatán, Mexico

  Omar Delgado-Rodríguez, Oscar Campos-Enríquez, Jaime Urrutia-Fucugauchi, Jorge A. Arzate

  271-283

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• The El Tocuyo, Venezuela, earthquake of 3 August, 1950: Focal parameters and tectonic implications

  José E. Choy

  285-292

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• Low-temperature demagnetization of volcanic rocks containing multi-domain magnetic grains: Implications for the Thellier paleointensity determination

  Juan Morales, Avto Goguitchaichvili, Luis Alva-Valdivia, Ana-María Soler

  293-300

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• Geochemistry of the Chiltepec sanitary landfill, Puebla, Mexico

  Luis E. Marín, Rosa María Leal Bautista, Rosario Rubio, Elizabeth Prieto

  301-307

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• The precipitation series in La Plata, Argentina and its posible relationship with geomagnetic activity

  Julio C. Gianibelli, Jacqueline Köhn, Eduardo E. Kruse

  309-314

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• An estimation of the mass dragged by the solar wind from Mars’s atmosphere in its geologic history

  Héctor Javier Durand-Manterola

  315-320

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