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BOLETÍN DE LA SOCIEDAD GEOLÓGICA MEXICANA http://dx.doi.org/10.18268/BSGM2009v61n3a13
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NOTA TÉCNICA
Una nueva interpretación de la estratigrafía de la Región de Tolimán, Estado de Querétaro
A new interpretation of the stratigraphy in the Tolimán region, state of Querétaro
Víctor M. Dávila Alcocer,1*, Elena Centeno García1, Victor Valencia2 y Elisa Fitz D.3
1 Departamento de Geología, Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D. F,. 04510.
2 Department of Geosciences, University of Arizona.
3 Department of Geology and Geophysics, University of Minnesota.
* This email address is being protected from spambots. You need JavaScript enabled to view it..
Abstract
It is proposed in this note that the oldest terrigenous rocks cropping out in the Tolimán region in the state of Querétaro belong to two different units: El Chilar complex and the San Juan de la Rosa Formation. The first consists of highly deformed siliciclastic turbidites and the second is a volcano–sedimentary succession deposited in marine conditions. The volcanism of the San Juan de la Rosa Formation is felsic in composition and Late Jurassic–Early Cretaceous in age. We postulate as a working hypothesis that the felsic magmatism of the San Juan de la Rosa Formation are part of the Jurassic volcanic arc in central Mexico that migrated in time and space towards the south.
Key words: Jurassic, Cretaceous, volcanic arc, felsic, Mexico.
