Datasets

Virginia Department of Environmental Quality

Virginia Physiographic Regions

This is a polygon coverage of Physiographic Divisions in the conterminous United States cropped to the state boundary of Virginia. It was automated from Fenneman's 1:7,000,000-scale map, "Physical Divisions of the…

Arlington County - GIS Portal

Geology Poly

Arlington County - GIS Portal

Fault Line

Loudoun County

Loudoun Geologic Structure

More Metadata "Structure" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Structure" is the point file of geologic strike and dip as…

Loudoun County

Loudoun Geologic Surficial

More Metadata "Surficial" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Surficial" is the mapping overlying surficial deposits, or the…