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Major submarine fans of the California continental rise

By
William R. Normark
William R. Normark
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Christina E. Gutmacher
Christina E. Gutmacher
U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025
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Published:
January 01, 1989

Abstract

Between the Murray and Mendocino Fracture Zones off the central California margin, the bulk of the continental rise is formed by two major submarine fan deposits, the Monterey Fan to the south and the Delgada Fan to the north (Menard, 1955, 1960) (Fig. 1 and Plate IB). In between these large canyon-fan systems, several small submarine canyons, which dissect the continental slope between Monterey Bay and Pt. Arena, have formed a sloping ramp of sediment without pronounced fan shapes. South of the Monterey Fan, the much smaller Arguello Fan (just south of Fig. 1) is the only other distinctly fan-shaped turbidite system on the deep-sea floor (deposited on oceanic crust) between central California and the southernmost part of the Baja California peninsula.

Data in this chapter are largely drawn from recent review papers on the Monterey and Delgada Fans included in the COMFAN (Committee on Fans) compilation and comparison of turbidite depositional systems (Bouma and others, 1985). Little new data are available since the COMFAN summaries, and although the extensive GLORIA (Geologic Long Range Inclined ASDIC [side-scan sonar]) coverage over both these fans will shed light on morphologic features not adequately mapped to date (Field and others, 1984; McCulloch and others, 1984), these data will not be available in time for inclusion in this chapter. Herein, we focus on depositional processes and summarize earlier work on fan structure and history.

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DNAG, Geology of North America

The Eastern Pacific Ocean and Hawaii

E. L. Winterer
E. L. Winterer
Scripps Institution of Oceanography La Jolla, California 92093
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Donald M. Hussong
Donald M. Hussong
University of Hawaii Department of Geology and Geophysics Honolulu, Hawaii 96822
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Robert W. Decker
Robert W. Decker
4087 Silver Bar Road Mariposa, California 95338
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Geological Society of America
Volume
N
ISBN electronic:
9780813754659
Publication date:
January 01, 1989

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