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| | USGS OFR 02-002: Summary Report - Block Island Sound |
 | | An extensive high-resolution, seismic-reflection survey was conducted in Block Island Sound (Figure 1) by the U.S. Geological Survey, in cooperation with the State of Connecticut Geological and Natural History Survey, Department of Environmental Protection (D.E.P.), to determine the stratigraphic framework and Quaternary history of the sound. |
 | | Off the coast, granite underlies Fishers Island (Fuller, 1905), granite gneiss and schist underlie central and eastern Long Island (Suter and others, 1949; de Laguna, 1963), and crystalline rock similar to the bedrock of the mainland is thought to underlie Block Island and its vicinity (Oliver and Drake, 1951; Tuttle and others, 1961). |
 | | Block Island, Fishers Island, and Long Island are capped by two glacial drift sheets representing two ice advances, one of late Wisconsinan age and one that predates the late Wisconsinan (Donner, 1964; Sirkin 1971, 1976, 1982; Mills and Wells, 1974). |
| woodshole.er.usgs.gov /openfile/of02-002/htmldocs/bissum.htm (4089 words) |
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