Archive of Digital Chirp Subbottom Profile Data Collected During USGS Cruises 09CCT03 and 09CCT04, Mississippi and Alabama Gulf Islands, June and July 2009

In June and July of 2009, the U.S. Geological Survey conducted geophysical surveys to investigate the geologic controls on island framework from Cat Island, Mississippi, to Dauphin Island, Alabama, as part of a broader USGS study of Coastal Change and Transport (CCT). This report serves as an archive of unprocessed digital Chirp seismic reflection data, trackline maps, navigation files, Geographic Information System (GIS) files, Field Activity Collection System (FACS) logs, observer's logbook, and formal Federal Geographic Data Committee (FGDC) metadata. Gained (a relative increase in signal amplitude) digital images of the seismic profiles are also provided.

For more information on the seismic surveys see http://walrus.wr.usgs.gov/infobank/c/c309gm/html/c-3-09-gm.meta.html and http://walrus.wr.usgs.gov/infobank/g/g409gm/html/g-4-09-gm.meta.html

These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications.