Other ID: 9409
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Stellwagen Bank National Marine Sanctuary, United States, North America, North Atlantic;
Principal Investigator(s): Page Valentine
Data Type(s): Sampling: Geology, Imagery: Photo, Imagery: Video, Sonar: Sidescan, Sonar: Single Beam, Location-Elevation: Navigation
Scientific Purpose/Goals: Document character/distribution of fisheries habitats in SE Stellwagen Bank w/ sidescan sonar, video, photo, and samples. Resurvey/sample areas surveyed April and Sep. 1993 to evaluate changes in dredge disturbance on sea bed; prepare sediment distribution/bio habitat maps.
Start Date: 1994-10-11
Start Port/Location: Woods Hole, MA
End Date: 1994-10-25
End Port/Location: Woods Hole, MA
Equipment Used: Grab sampler - Van Veen , Osprey camera system, Klein 595 100/500kHz sidescan sonar, Benthos fish tracking system, DGPS
Information to be Derived:
Summary of Activity and Data Gathered: Previous cruises have imaged the southwestern part of Stellwagen Bank. This cruise expanded sidescan sonar coverage to the east. Bottom sediment is coarse sand and gravel on the southeastern part of the bank, and it is the source of the sand that is moved westward during large storms from the northeast. Several sidescan lines that were surveyed in April and September 1993 were resurveyed on this cruise. The distribution of storm deposits has not changed since the earlier surveys, and no large nor'easters have occurred since December 1992. These observations support the hypothesis that the bank surface is unaffected by tidal currents and minor storms. Large storms and fishing gear (dredges and trawls) apparently are the major causes of habitat disturbance on the bank.
Staff: Dann Blackwood, Page Valentine, Kenneth E. Parolski, Eric A. Schmuck
Notes: Field work conducted in two parts: October 11-16 and October 23-25.
Buczkowski, B.J., and Kelsey, S.A., 2007, Archival policies and collections database for the Woods Hole Science Center's marine sediment samples: U.S. Geological Survey Open-File Report 2006-1187, CD-ROM, URL: http://pubs.usgs.gov/of/2006/1187/.
Valentine, P.C., Gallea, Leslie B., Blackwood, Dann S., and Twomey, Erin R., 2010, Seabed photographs, sediment texture analyses, and sun-illuminated sea floor topography in the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts: U.S. Geological Survey Data Series 469, URL: http://pubs.usgs.gov/ds/469/.