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Subduction and exhumation of the Pelona-Orocopia-Rand schists, southern California

Geology

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Abstract

The Pelona, Orocopia, and Rand schists of southern California and southwestern Arizona are thought to have formed in either the same east-dipping subduction zone as the Franciscan complex or in a southwest-dipping subduction zone related to collision of an outboard continental fragment with North America. The principal justification for the collision model has been the observation that continental rocks overlying the schists locally show transport to the northeast. Field and petrographic studies now confirm that the northeast movement occurred during exhumation of the schist, not during subduction. Combined with regional geologic relations, this evidence makes the collision model unlikely.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Subduction and exhumation of the Pelona-Orocopia-Rand schists, southern California
Series title:
Geology
Volume
24
Issue:
6
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
547
Last page:
550
Number of Pages:
4