1. Preliminary geologic map of the Mountain Falls quadrangle, Frederick and Shenandoah counties, Virginia, and Hampshire County, West Virginia [microform] Yale Public content 1995. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Virginia, Frederick County, Shenandoah County, West Virginia, and Hampshire County.