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Are submarine and subaerial drainages morphologically distinct?

Stephen C. Dobbs, Tim McHargue, Matthew A. Malkowski, Jared T. Gooley, Chayawan Jaikla, Colin J. White and George E. Hilley
Are submarine and subaerial drainages morphologically distinct?
Geology (Boulder) (November 2019) 47 (11): 1093-1097


The qualitative resemblance between terrestrial and submarine branched valley networks has led to speculation that common underlying processes control their formation. However, quantitative comparisons have been impeded by methodological limitations and coarse resolution in marine systems. We analyze channel concavity and steepness indices of 23 terrestrial and 29 submarine catchments to determine whether their profile morphologies are distinct. Statistical comparisons of these quantities demonstrate that concavity indices in submarine systems are, in general, lower than in subaerial systems, and that submarine tributaries are steeper than their associated mainstem. These differences may reflect distinct drainage formation mechanisms and dynamics of submarine sediment gravity flows as compared to overland flow processes.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 47
Serial Issue: 11
Title: Are submarine and subaerial drainages morphologically distinct?
Affiliation: Stanford University, Department of Geological Sciences, Stanfrod, CA, United States
Pages: 1093-1097
Published: 201911
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 2019-095254
Categories: GeomorphologyOceanography
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2019376
Illustration Description: illus. incl. sketch maps
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201923
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