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Summary for Field Activity Number 2007-007-FA

Area of Operations: Chandeleur Islands, Breton Sound, Louisiana, northern Gulf of Mexico, United States, North America, North Atlantic

Dates: June 10, 2007 to June 22, 2007

Objectives: Sea floor mapping along the offshore side of the southern part of the Chandeleur Islands, Gulf of Mexico.

Type of Activity: Sea floor mapping

Information to be derived:

Summary: This two-week cruise aboard the R/V ACADIANA collected bathymetric, sidescan sonar and chirp seismic data along the offshore side of the southern half of the Chandeleur Island chain of eastern Louisiana. The survey was coordinated with additional surveys conducted by the R/V GILBERT and a University of New Orleans vessel that collected bathymetric and seismic data near the islands and along the back side of the island chain. The purposes for collecting these data were (1) to provide a detailed post-Katrina bathymetry, (2) to study the processes that have shaped the sea floor in an effort to better understand the effects of Hurricane Katrina, and (3) to understand the influence of the underlying stratigraphy on the sea floor geology. The offshore geophysical dataset was collected on a grid of lines spaced 100 m apart in the shore parallel direction and 1000 m apart in the shore normal direction. Submetrix swath bathymetric data and Klein sidescan sonar imagery were collected along 2146 km of tracks and EdgeTech 512i chirp sub-bottom data were collected along 1654 km of tracks.

USGS Project Number: 2921-CNV77 - Project Description

Contact: Dave Twichell (

InfoBank: uses the identifier A-1-07-LA. Visit this site for more information.

Map for Area of Operations :

Map of field activity boundary.

Platform Info:

The following materials for this field activity are available in the Information Archives:

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