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Possible evidence for subducted sedimentary materials beneath central California.

Geology

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Abstract

Seismic reflection and refraction data from the Coast Ranges of central California W of the San Andreas fault suggest the presence of a low-velocity (4.5-5.0 km/s) wedge at a depth of about 15-22 km that dips E beneath rocks of both the Franciscan assemblage and the Salinian block. We propose that the wedge represents sedimentary materials that were subducted in an offshore trench within the past 23 Ma. The refraction data also suggest the presence of a second low-velocity zone that extends at least to mid-crustal depths beneath the San Andreas fault zone.-Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Possible evidence for subducted sedimentary materials beneath central California.
Series title:
Geology
Volume
15
Issue:
3
Year Published:
1987
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
254
Last page:
258
Number of Pages:
5