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Metadata
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ID
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07007
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Also Known As
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A-1-07-LA
07007
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Abstract
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United States Geological Survey, Woods Hole, Massachusetts.
Chief Scientist: David Twichell. Data (Navigation-DGPS,
Navigation-Hypack, Seismic reflection-Edgetech 512i,
Sidescan-Klein 3000, Swath bathymetry-SEA Submetrix 2000
interferometric sonar, operated at 234 kHz) of field activity
07007 (A-1-07-LA) in Chandeleur Islands, Louisiana, northern
Gulf of Mexico, United States, North America, North Atlantic
from 06/10/2007 to 06/22/2007
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Organization
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United States Geological Survey, Woods Hole, Massachusetts
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Project/Theme
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Northern Gulf Coast Ecosystem Change
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Chief Scientist
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David Twichell
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Platform
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Acadiana
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Area of Operation
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Chandeleur Islands, Louisiana, northern Gulf of Mexico, United States, North America, North Atlantic
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Location map
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Bounding Coordinates
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29.75000
-89.25000 -88.75000
28.33333
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Ports
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LEAVE Venice, LA
ARRIVE Venice, LA
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Dates
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06/10/2007 (JD 161) to 06/22/2007 (JD 173)
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Analog Materials
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No analog holdings.
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Index map
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Information Specialist
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Crew
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David Twichell
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Chief Scientist
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Chuck Worley
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Emile Bergeron
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Bill Danforth
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Wayne Baldwin
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Equipment Used
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Navigation-DGPS
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Navigation-Hypack
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Seismic reflection-Edgete
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(ch 512i)
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Sidescan-Klein 3000
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Swath bathymetry-SEA Subm
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(etrix 2000 interferometric sonar)
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operated at 234 kHz
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Purpose
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Seafloor mapping along the offshore side of the southern
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part of the Chandeleur Islands, Gulf of Mexico
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Summary
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This two-week cruise aboard the R/V ACADIANA collected
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bathymetric, sidescan sonar and chirp seismic data along the
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offshore side of the southern half of the Chandeleur Island chain of
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eastern Louisiana. The survey was coordinated with additional
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surveys conducted by the R/V GILBERT and a University of New Orleans
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vessel that collected bathymetric and seismic data near the islands
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and along the back side of the island chain. The purposes for
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collecting these data were (1) to provide a detailed post-Katrina
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bathymetry, (2)to study the processes that have shaped the sea floor
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in an effort to better understand the effects of hurricane Katrina,
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and (3) to understand the influence of the underlying stratigraphy
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on the sea floor geology. The offshore geophysical dataset was
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collected on a grid of lines spaced 100 m apart in the shore
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parallel direction and 1000 m apart in the shore normal direction.
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Submetrix swath bathymetric data and Klein sidescan sonar imagery
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were collected along 2146 km of tracks and Edgetech 512i chirp
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subbottom data were collected along 1654 km of tracks.
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Notes
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Navigation technique: DGPS.
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Project number and name: 2921-CNV77 Northern Gulf Coast Ecosystem Change
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14 days at sea.
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2146 kms. of continuous data.
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0 stations occupied.
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Funding
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USGS and Louisiana Department of Natural Resources
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Got Help?
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For 07007, we would appreciate any information on -- activity type, analog materials, contract, days at sea, dive count, information to be derived, kms of navigation, national plan, NGDC Info, owner, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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