U.S. Department of the Interior                                 USGS Open File Report 00-264
U.S. Geological Survey

 

Geologic Map of the Potomac River Gorge:
Great Falls Park, Virginia, and part of the
C&O Canal National Historical Park, Maryland

Compiled by Scott Southworth, Carrie Fingeret, and Thomas Weik

 

INTRODUCTION AND GEOLOGIC MAP

The Geologic Map of the Potomac River Gorge: Great Falls Park, Virginia, and part of the C&O Canal National Historical Park, Maryland, shows the types of rock and landforms of the Potomac River Gorge within the Piedmont physiographic province of the Central Appalachian region. The map was produced from information collected by geologists over a period of more than 25 years (Reed and Reed, 1969; Drake and Lee, 1989; Drake and Froelich, 1997; and Drake and others, 1999). The data were computerized to make a geographic information system (GIS) for the National Park Service and to provide a color map for park visitors. Readers are referred to The River and the Rocks (U.S. Geological Survey Bulletin 1471, by Reed and others, 1980) because it more fully describes the geology of the area.

This map was produced using ArcInfo and Adobe Illustrator.  The map is available for download in PDF format.
Great Falls (PDF  2.13Mb)