1U.S. Geological Survey, Montpelier, VT 05601 2U.S. Geological Survey, Denver, CO 80225 3U.S. Geological Survey, Reston, VA 20192
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.