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Poppe, L.J., Ackerman, S.D., Doran, E.F., Moser, M.S., Stewart, H.F., Forfinski, N.A., Gardner, U.L., and Keene, J.A., 2006b, Geologic interpretation and multibeam bathymetry of the sea floor in southeastern Long Island Sound: U.S. Geological Survey Open-File Report 2006–1059, DVD. (Also available at https://pubs.usgs.gov/of/2006/1059/.)

Poppe, L.J., Denny, J.F., Williams, S.J., Moser, M.S., Stewart, H.F., Forfinski, N.A., and Doran, E.F., 2007a, The geology of Six Mile Reef, eastern Long Island Sound: U.S. Geological Survey Open-File Report 2007–1191, DVD. (Also available at https://pubs.usgs.gov/of/2007/1191/.)

Poppe, L.J., DiGiacomo-Cohen, M.L., Smith, S.M., Stewart, H.F., and Forfinski, N.A., 2006c, Seafloor character and sedimentary processes in eastern Long Island Sound and western Block Island Sound: Geo-Marine Letters, v. 26, p. 59–68.

Poppe, L.J., DiGiacomo-Cohen, M.L., Smith, S.M., Stewart, H.F., and Forfinski, N.A., 2007b, Geological interpretation and multibeam bathymetry of the sea floor in the vicinity of the Race, eastern Long Island Sound: U.S. Geological Survey Open-File Report 2007–1012, DVD. (Also available at https://pubs.usgs.gov/of/2007/1012/.)

Poppe, L.J., Lewis, R.S., Denny, J.F., DiGiacomo-Cohen, M.L., and Parolski, K.F., 1999a, Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor around Falkner Island, Connecticut: U.S. Geological Survey Geologic Investigations Map I–2671, 2 sheets, scale 1:10,000.

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Poppe, L.J., Lewis, R.S., Denny, J.F., Parolski, K.F., DiGiacomo-Cohen, M.L., and Tolderlund, D.S., 1998b, Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor in Niantic Bay, Connecticut: U.S. Geological Survey Geologic Investigations Map I–2625, 2 sheets, scale 1:11,750.

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