Robert B. Scott John N. Aleinikoff Thomas R. Armstrong Gregory J. Walsh 2006 This report presents a preliminary map of the bedrock geology of the Old Lyme quadrangle, New London and Middlesex Counties, Connecticut. The map depicts contacts of bedrock geologic units, faults, outcrops, and structural geologic information. The map was published as part of a study of fractured bedrock aquifers and regional tectonics. application/pdf 10.3133/ofr20061296 en U.S. Geological Survey Preliminary Bedrock Geologic Map of the Old Lyme Quadrangle, New London and Middlesex Counties, Connecticut reports