Abstract

DAVILA ALCOCER, Víctor M.; CENTENO GARCIA, Elena; VALENCIA, Victor  and  FITZ D., Elisa. A new interpretation of the stratigraphy in the Tolimán region, state of Querétaro. Bol. Soc. Geol. Mex [online]. 2009, vol.61, n.3, pp.491-497. ISSN 1405-3322.

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.

Keywords : Jurassic; Cretaceous; volcanic arc; felsic; Mexico.

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