Bedrock geologic map of the Ansonia quadrangle, Fairfield and New Haven Counties, Connecticut [cartographic material] / by Crawford E. Fritts ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the State of Connecticut, Geological and Natural History Survey
"Contour interval 10 feet." "Base from U.S. Geological Survey topographic quadrangle, 1953. Roads as of 1964." "Geology by C.E. Fritts 1961-62, assisted by P.B. Leavens, 1961, and P.S. Ely, 1962." Includes cros sections, location map, index map, and text. Relief shown by contours and spot heights.
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