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Book Chapter

Submarine Mudslide Morphology And Development Mechanisms, Mississippi Delta

By
D. B. Prior
D. B. Prior
Coastal Studies Institute
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J. N. Suhayda
J. N. Suhayda
Coastal Studies Institute
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Published:
January 01, 1981

Abstract

Continued data acquisition from the Mississippi delta-front slopes has allowed more detailed evaluation of mudslide morphology. Subsidence source bowl geometry appears consistent with a retrogression model, Suggesting that they emlarge and develop upslope by a process of strain remodling following initial failure. Transport chutes have characteristics that suggest plug flow, and this is evaluated using a model developed foe subaerial debris flows. Undrained loading in the downslope depositional zones provides a mechanism to explain lobe progradation. A development sequence for mudslide evolution and elongation is outlined, consisting of three major stages: initial failure, retrogression and progradation, and loading and downslope propagation. The main implications for offshore engineering are that design criteria should acknowledge the site-specific characteristics os mudslides.

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AAPG Continuing Education Course Notes Series

Offshore Geologic Hazards: A Short Course Presented at Rice University, May 2-3, 1981 for the Offshore Technology Conference

Arnold Bouma
Arnold Bouma
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Dwight Sangrey
Dwight Sangrey
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James Coleman
James Coleman
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David Prior
David Prior
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Anita Trippet
Anita Trippet
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Wayne Dunlap
Wayne Dunlap
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James Hooper
James Hooper
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American Association of Petroleum Geologists
Volume
18
ISBN electronic:
9781629812618
Publication date:
January 01, 1981

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