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Open-File Report 2014-1079

Temporal Changes in Lithology and Radiochemistry from the Back-barrier Environments along the Chandeleur Islands, Louisiana: March 2012–July 2013

By Marci E. Marot, C. Scott Adams, Kathryn A. Richwine, Christopher G. Smith, Lisa E. Osterman, and Julie C. Bernier


Scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center conducted a time-series collection of shallow sediment cores from the back-barrier environments along the Chandeleur Islands, Louisiana from March 2012 through July 2013. The sampling efforts were part of a larger USGS study to evaluate effects on the geomorphology of the Chandeleur Islands following the construction of an artificial sand berm to reduce oil transport onto federally managed lands. The objective of this study was to evaluate the response of the back-barrier tidal and wetland environments to the berm.

This report serves as an archive for sedimentological, radiochemical, and microbiological data derived from the sediment cores. Data are available for a time-series of four sampling periods: March 2012; July 2012; September 2012; and July 2013. Downloadable data are available as Excel spreadsheets and as JPEG files. Additional files include: ArcGIS shapefiles of the sampling sites, detailed results of sediment grain size analyses, and formal Federal Geographic Data Committee metadata.

First posted October 17, 2014

For additional information contact:
St. Petersburg Coastal and Marine Science Center
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701

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Suggested citation:

Marot, M.E., Adams, C.S., Richwine, K.A, Smith, C.G., Osterman, L.E., and Bernier, J.C., 2014, Temporal changes in lithology and radiochemistry from the back-barrier environments along the Chandeleur Islands, Louisiana—March 2012–July 2013: U.S. Geological Survey Open-File Report 2014-1079, 1 DVD,

ISSN 2327-638X (online)




Field Data Collection

Laboratory Methods and Analysis

Data Downloads


References Cited

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