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Book Chapter

Detachment Faulting as a Mechanism for Tectonically Filling the Gulf of California During Dilation

By
R. Gordon Gastil
R. Gordon Gastil
Department of Geological Sciences San Diego State University San Diego, California, U.S.A.
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Scott S. Fenby
Scott S. Fenby
Department of Geological Sciences San Diego State University San Diego, California, U.S.A.
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Published:
January 01, 1991

Abstract

The Gulf of California depression is a part of a larger province of listric normal fault extension which covers much of southern Arizona and southeastern California. East of the Gulf of California this style of upper crustal deformation ceased prior to 10 Ma, but beneath the western part of the Gulf and throughout the depressed area west of the Gulf this style of deformation continues to the present day.

The rhombochasmic exposure of sea floor along the axis of the Gulf is a special expression of the provincial extension, facilitated by the presence of strike-slip faulting. It is believed that detached slabs of upper crust tend to fill the rhombochasms as they form, causing sea-floor exposure to be temporary and local. When detached slabs from the marginal areas are no longer able to fill the chasm, permanent sea-floor exposure will begin.

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Contents

AAPG Memoir

The Gulf and Peninsular Province of the Californias

J. Paul Dauphin
J. Paul Dauphin
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Bernd R. T. Simoneit
Bernd R. T. Simoneit
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American Association of Petroleum Geologists
Volume
47
ISBN electronic:
9781629811130
Publication date:
January 01, 1991

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