1. Reconnaissance geologic map of the Clarksville north and Boydton 7.5-minute quadrangles, Mecklenburg and Charlotte counties, Virginia [microform] Yale Public content 1997. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Virginia, Mecklenburg County, and Charlotte County.