Geological Characterization of Select Mississippi Shelf Sites
[Technical Report, Memorandum Report]
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
This report documents results of a seabed survey in the Mississippi Bight conducted 16-22 December 2005 from the RV Pelican. The objective of the survey was to find a site in proximity to the NRL Stennis in about 27 meters water depth with uniform soft clayey silt to silty clay sediments over the upper two meters of seabed profile for testing of an acoustic sediment classification system. This report documents the physical and geotechnical properties of the upper 2 meters of the sediments at the locations investigated. The top 1050 cm of the sediments exhibits characteristics of storm deposits that can be readily interpreted as the results of Hurricane Katrina that passed through the study area on August 29, 2006. As a result of the storm, the study area is no longer composed of uniform soft sediments, but is covered with a 1050-cm-thick deposit of thinly laminated sandy layers. In addition, the sediment cores contain records of historic catastrophic storms in the Mississippi Bight area.
- Geology, Geochemistry and Mineralogy