Skip to main content
U.S. flag

An official website of the United States government

Characteristics of a sandy depositional lobe on the outer Mississippi fan from SeaMARC IA sidescan sonar images

January 1, 1992

SeaMARC IA sidescan sonar images of the distal reaches of a depositional lobe on the Mississippi Fan show that channelized rather than unconfined transport was the dominant transport mechanism for coarse-grained sediment during the formation of this part of the deep-sea fan. Overbank sheet flow of sands was not an important process in the transport and deposition of the sandy and silty sediment found on this fan. The dendritic distributary pattern and the high order of splaying of the channels, only one of which appears to have been active at a time, suggest that coarse-grained deposits on this fan are laterally discontinuous.

Publication Year 1992
Title Characteristics of a sandy depositional lobe on the outer Mississippi fan from SeaMARC IA sidescan sonar images
DOI 10.1130/0091-7613(1992)020<0689:COASDL>2.3.CO;2
Authors David C. Twichell, William C. Schwab, C. Hans Nelson, Neil H. Kenyon, Homa J. Lee
Publication Type Article
Publication Subtype Journal Article
Series Title Geology
Index ID 70138224
Record Source USGS Publications Warehouse
USGS Organization Woods Hole Coastal and Marine Science Center