Fallamiento y estratigrafía cenozoicos en la parte sudoriental de la Sierra de Guanajuato

Abstract

A tectonic depression, La Sauceda graben, constitutes the southeastern boundary of the Sierra de Guanajuato and separates it from the Sierra de Codornices.

Continental volcanic and sedimentary rocks of Cenozoic age cut by normal faults are found throughout the area of study. Five phases of faulting have been identified and these can be separated into two distinct age groups; the first ranges from Paleocene?-Eocene time until the later part of the early Oligocene and the second is Pliocene-Pieistocene in age. The rocks that outcrop in this area also belong to the time spans mentioned previously, leaving a gap of approximately 25 Ma from which there is no record.

Faults show two prominent directions, NW-SE and NE-SW, and were probably formed as a result of the differences in the physical properties of the Mesozoic rocks in this region... In order to continue, download the full article in PDF