Paleomagnetic results from southern México
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Resumen
Análisis de resultados paleomagnéticos en muestras de las Formaciones Pérmicas lnferiores de Paso Hondo y Grupera, colectadas cerca de Chicomuselo, Chiapas, indican que el área estudiada se encontraba en relación con la parte cratónica de Norteamérica, en latitudes ecuatoriales y orientada 22° en sentido contrario a las manecillas .del reloj. En contraste, la paleoposición determinada de la Formación Pensilvánica-Pérmica Yododeñe, muestreada cerca de Nochixtlán, Oaxaca, está de acuerdo con la estimada usando datos equivalentes de Norteamérica. Estos resultados implican que el Istmo de Tehuantepec representa una discontinuidad mayor y apoyan nuestra sugerencia anterior de que Mesoamérica consistió en una serie de bloques tectónicos.
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