Figure 1. Location of the Long Island Sound estuary. The outlined map area is presented in figures 2 and 4. Contours show water depths of 40 meters (131 feet). |
Figure 2. Locations of sidescan sonographs, grab samples, and video-camera observations used to infer the distribution and characteristics of sea-floor sedimentary environments within the Long Island Sound estuary. The 10-meter (33-foot) depth contour delineates the shoreward limit of the study area along the Connecticut and Long Island coasts. |
Figure 3. Sonograph obtained across the east-central part of Long Island Sound showing an environment of coarse-grained bedload transport depicted by patterns of sand ribbons and sand waves. Such areas contain only small amounts of fine-grained sediments and associated contaminants and may have significant sand resources. A sunken vessel about 18 meters (59 feet) long (marked by asterisk) is present in the sand-ribbon area. |
Figure 4. Reconnaissance map showing the distribution of sedimentary environments across the Long Island Sound estuary. Sedimentary environments have been inferred from sonograph patterns, sediment samples, video-camera observations, and modeled current and wave data. The 10-meter (33-foot) depth contour delineates the shoreward limit of the study area along the Connecticut and Long Island coasts. |
For more information, please contact:
Harley J. Knebel |
|
Woods Hole Field Center 384 Woods Hole Road Woods Hole, MA 02543-1598 |
Telephone: (508) 457-2269 Fax: (508) 457�10 E-mail: hknebel@usgs.gov |
U.S. Department of the Interior U.S. Geological Survey |
USGS Fact Sheet FS 041-98 April 1998 |