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Geology and ground-water resources of Washington, D.C., and vicinity, with a section on chemical quality of the water
Paul McKelvey Johnston, D. E. Weaver, Leonard Siu
1964, Water Supply Paper 1776
The area of this report includes 436 square miles centered about the District of Columbia. The area contains parts of two distinctly different physiographic provinces-the Piedmont and the Coastal Plain. The Fall Line, which separates the Piedmont province on the west from the Coastal Plain Province on the east, bisects...