The area of investigation comprises approximately 540 square miles and lies entirely within the Great Valley section of the Valley and Ridge physiographic province. The Great Valley is underlain chiefly by carbon ate rocks in the south and by shale and graywacke in the north. Most of the carbonate rocks are included in two great nappes that differ appreciably in stratigraphic detail.
Additional publication details
State/Local Government Series
Geology and groundwater resources of northern Berks County, Pennsylvania