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Seafloor character and sedimentary processes in eastern Long Island Sound and western Block Island Sound

December 31, 2006

Multibeam bathymetric data and seismic-reflection profiles collected in eastern Long Island Sound and western Block Island Sound reveal previously unrecognized glacial features and modern bedforms. Glacial features include an ice-sculptured bedrock surface, a newly identified recessional moraine, exposed glaciolacustrine sediments, and remnants of stagnant-ice-contact deposits. Modern bedforms include fields of transverse sand waves, barchanoid waves, giant scour depressions, and pockmarks. Bedform asymmetry and scour around obstructions indicate that net sediment transport is westward across the northern part of the study area near Fishers Island, and eastward across the southern part near Great Gull Island.

Citation Information

Publication Year 2006
Title Seafloor character and sedimentary processes in eastern Long Island Sound and western Block Island Sound
DOI 10.1007/s00367-006-0016-4
Authors Lawrence J. Poppe, M. L. Cohen-DiGiacomo, S. M. Smith, H.F. Stewart, N.A. Forfinski
Publication Type Article
Publication Subtype Journal Article
Series Title Geo-Marine Letters
Index ID 70195021
Record Source USGS Publications Warehouse
USGS Organization Woods Hole Coastal and Marine Science Center