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

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, ex...

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Bibliographic Details
Published inGeo-marine letters Vol. 26; no. 2; pp. 59 - 68
Main Authors Poppe, L. J., DiGiacomo-Cohen, M. L., Smith, S. M., Stewart, H. F., Forfinski, N. A.
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.06.2006
Subjects
Bathymetry
Glacial features
Glaciers
Marine
Ocean bottom
Ocean floor
River beds
Sand waves
Scour
Sediment transport
Sedimentary structures
Sedimentation & deposition
Seismology
Long Island Sound
Block Island
ANW, USA, Long Island Sound
Canada, Newfoundland, Gull I
ANW, USA, Rhode Island, Block Island Sound
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Summary: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. [PUBLICATION ABSTRACT]
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0276-0460
1432-1157
DOI:10.1007/s00367-006-0016-4