1. Surficial geologic map of the Deep River quadrangle, Connecticut [cartographic material] Yale Public content 1977. 2012-06-04T14:31:25Z. 2012-06-13T15:03:33Z. O'Leary, Dennis W. U.S. Geological Survey. English. Public. Connecticut, Deep River Region, Middlesex County, New London County, and U.S.