1. Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay Watershed, Virginia and Maryland Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading
2. Geologic map of the Clarksville South and Tungsten 7.5-minute quadrangles, Virginia and North Carolina Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Resource Type: Map Access & Availability: Loading