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Presenters Notified: November 2012

Program Schedule Posted:November 2012

Abstracts Available: January 2013

Meeting:
17-22 February 2013

Flocks, J., U.S. Geological Survey - SPCMSC, USA, jflocks@usgs.gov
Twichell, D., U.S. Geological Survey - WHCMSC, USA
Pendleton, E., U.S. Geological Survey - WHCMSC

COAST-WIDE GEOLOGIC-ASSESSMENT PROJECTS: UNRAVELING REGIONAL COASTAL EVOLUTION

Since 2007, the U.S. Geological Survey (USGS), in collaboration with the National Park Service and the U.S. Army Corps of Engineers (USACE), has mapped over 300 km2 of seafloor and substrate around the Mississippi barrier islands as part of the USGS Northern Gulf of Mexico ecosystem change and hazard susceptibility project (NGOM) and the USACE Mississippi coastal-improvement project (MsCIP). The purpose of these investigations is to characterize the near-surface stratigraphy and identify the influence it may have on island evolution. High-resolution bathymetry, seafloor imaging, and sub-bottom profiling were integrated with historical data to identify morphologic and subsurface features such as shoals, lowstand valley fill, tidal-delta and abandoned barrier deposits. The spatial distribution and stratigraphic relations of these features reflect the diverse regional interaction between the Holocene advance of the Mississippi River Delta from the west, transgressive shoal development to the east, and infilling of Pleistocene river valleys, which influenced island and inlet development. Comprehensive projects such as these provide a wealth of information that further our understanding of coastal-landscape evolution too complex for integrated site-specific studies.

http://coastal.er.usgs.gov

Oral presentation

Session #:SS25
Date: 2/22/2013
Time: 10:30