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Book Chapter

Sierra de Catorce: Remnants of the ancient western equatorial margin of Pangea in central Mexico

By
José Rafael Barboza-Gudiño
José Rafael Barboza-Gudiño
Instituto de Geología, Universidad Autónoma de San Luis Potosí, Manuel Nava 5, Zona Universitaria C.P. 78240 San Luis Potosí, S.L.P, México
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Roberto S. Molina-Garza
Roberto S. Molina-Garza
Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, Qro., 76230, México
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Timothy F. Lawton
Timothy F. Lawton
Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico 88003, USA
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Published:
January 01, 2012

Abstract

The Sierra de Catorce in northern San Luis Potosí, Mexico, represents an uplifted block with exposures of the oldest rocks of the region which include Upper Triassic turbidites interpreted as deposits of a submarine fan system (“Potosí Fan”) and overlying Lower Jurassic volcanic and volcaniclastic strata interpreted as a record of the Early-Middle Jurassic volcanic arc (“Nazas Arc”) of western North America. These lower Mesozoic units, recognized in several exposures in the region, are interpreted as remnants of the ancient western margin of Pangea prior to accretion of Late Jurassic—Early Cretaceous magmatic arc complexes and associated marginal basins that constitute the Guerrero composite terrane in western Mexico and that resulted in construction of a new Pacific margin. A field trip in the Sierra de Catorce and surrounding exposures of the Upper Triassic—Lower Jurassic succession allows observation and discussion of key features that demonstrate the sedimentary and tectonic history of the western equatorial margin of Pangea.

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Contents

GSA Field Guide

The Southern Cordillera and Beyond

José Jorge Aranda-Gómez
José Jorge Aranda-Gómez
Universidad Nacional Autónoma de México Centro de Geociencias Campus Juriquilla Querétaro Qro. 76230 México
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Gustavo Tolson
Gustavo Tolson
Instituto de Geología Universidad Nacional Autónoma de México México D.F. 04510 México
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Roberto S. Molina-Garza
Roberto S. Molina-Garza
Universidad Nacional Autónoma de México Centro de Geociencias Campus Juriquilla Querétaro Qro. 76230 México
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Geological Society of America
Volume
25
ISBN electronic:
9780813756257
Publication date:
January 01, 2012

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