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From deep to modern time along the western Sierra Nevada Foothills of California, San Joaquin to Kern River drainages

By
Jason Saleeby
Jason Saleeby
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA
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Zorka Saleeby
Zorka Saleeby
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA
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Frank Sousa
Frank Sousa
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA
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Published:
January 01, 2013

Abstract

This two day field trip presents an overview of ~500 m.y. of diverse geologic history along the southwestern Sierra Nevada Foothills, with focus on several profound geologic features that distinguish this part of the western foothills. These features include (1) a highly deformed oceanic Moho section through the Kings River ophiolite, interpreted as a Carboniferous abyssal core complex; (2) Permo-Carboniferous ophiolitic mélange interpreted to have formed and been emplaced along the SW Cordilleran edge transform, along which the early Mesozoic convergent margin initiated; (3) Early Cretaceous mafic rocks of the western Sierra Nevada batholith, which also characterize much of the Great Valley basement; (4) evidence for 1000-m-scale paleo-relief of Late Cretaceous age; (5) anomalous subsidence of the Tulare subbasin of the Great Valley as an expression of ongoing mantle lithosphere delamination; and (6) the Kern arch and Kern range front epeirogenic uplift as an expression of active mantle lithosphere delamination.

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Contents

GSA Field Guide

Geologic Excursions from Fresno, California, and the Central Valley

Keith Putirka
Keith Putirka
Department of Earth and Environmental Sciences California State University, Fresno 2576 E. San Ramon Ave. M/S ST24 Fresno, California 93740 USA
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Geological Society of America
Volume
32
ISBN electronic:
9780813756325
Publication date:
January 01, 2013

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