Geologic map of the Williamsville Quadrangle, Virginia
K.F. Bick 1962 Virginia Division of Mineral Resources Report of Investigations No. 2
This 15 minute quadrangle map is located in the Appalachian Valley and Ridge province and contains moderately folded, Ordovician through Devonian sedimentary rocks. The folded sequence is cut by one major thrust fault. Robert Burger writes: 'Due to the map scale of 1:62,500, I scan the line of section at 300 dpi and at an enlargement of 200%. The scanned images are then printed on a color laser printer and assembled by students. This is the first major cross-section assigned in my course. Difficulty level for map interpretation: relatively easy; difficulty level for student-constructed cross sections: moderate.'