Sea-floor morphology and sedimentary environments in western Block Island Sound, offshore of Fishers Island, New York

Open-File Report 2014-1224
Prepared in cooperation with the National Oceanic and Atmospheric Administration
By: , and 

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Abstract

Multibeam-bathymetric and sidescan-sonar data, collected by the National Oceanic and Atmospheric Administration in a 114-square-kilometer area of Block Island Sound, southeast of Fishers Island, New York, are combined with sediment samples and bottom photography collected by the U.S. Geological Survey from 36 stations in this area in order to interpret sea-floor features and sedimentary environments. These interpretations and datasets provide base maps for studies on benthic ecology and resource management. The geologic features and sedimentary environments on the sea floor are products of the area’s glacial history and modern processes. These features include bedrock, drumlins, boulders, cobbles, large current-scoured bathymetric depressions, obstacle marks, and glaciolacustrine sediments found in high-energy sedimentary environments of erosion or nondeposition; and sand waves and megaripples in sedimentary environments characterized by coarse-grained bedload transport. Trawl marks are preserved in lower energy environments of sorting and reworking. This report releases the multibeam-bathymetric, sidescan-sonar, sediment, and photographic data and interpretations of the features and sedimentary environments in Block Island Sound, offshore Fishers Island.

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Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Sea-floor morphology and sedimentary environments in western Block Island Sound, offshore of Fishers Island, New York
Series title Open-File Report
Series number 2014-1224
DOI 10.3133/ofr20141224
Year Published 2015
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Woods Hole Coastal and Marine Science Center
Description HTML Document; DVD-ROM
Country United States
State New York
Other Geospatial Block Island Sound, Fishers Island
Datum World Geodetic System 1984
Online Only (Y/N) N
Additional Online Files (Y/N) N