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Woods Hole Coastal and Marine Science Center > USGS Studies in Long Island Sound >Research Topics> Geologic Framework

U.S. Geological Survey Studies in Long Island Sound:
Geology, Contaminants, and Environmental Issues


Geologic Framework: Structure and Geologic History of the Region

The bedrock, coastal-plain, glacial and post glacial components of the Long Island Sound basin provide clues to the regional Quaternary chronology of events. Together these components constitute a geologic setting that has controlled the development of this estuary and the character of its sea floor and continue to affect the dynamics of the modern sedimentary system.

Quaternary History

Link to digital seismic-reflection profiles in USGS Open-File Report 02-002

Links to interpretations of Quaternary History in USGS Open-File Report 00-304 and in the Journal of Coastal Research.

 

Seismic-reflection profile
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Section of a high-resolution seismic-reflection profile collected aboard the R/V Asterias in eastern Long Island Sound. Scale shows estimated penetration depths.

Seismic-reflection profile
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Section of a high-resolution seismic reflection profile collected from Long Island Sound with a boomer seismic system. Subbottom profiles can be used to interpret the geologic history of the basin.

Gravity

Link to Gravity results in USGS Open-File Report 00-304.

Map of gravity anomalies
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The air-free gravity anomalies in Long Island and Block Island Sounds.

Link to Publications on Geologic Framework

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