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Model
Number: 1257
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by R.C. Cady, 6 x 9-inch soft-cover book, 200 pages, 5 figures, 42 tables, 7 plates including Plate 2 – Geologic map of northern Virginia, scale 1 inch ~ 8.6 miles, 9 x 11-inch black and white map, 1938. This report represents the final summary of data that was earlier published in a preliminary format in Bulletin 041. The report describes the results of ground-water investigations in a six-county area extending across northern Virginia, including Frederick, Clarke, Loudoun, Prince William, Fairfax, and Arlington counties. The study was conducted as part of cooperative agreement with the U.S. Geological Survey and covered an area of about 1,919 square miles. Results are presented in tabular format for about 1,300 water wells, mostly residential use wells. The tabulated information includes well name, owner, location, depth to water, geologic formation, well yield, and other data. There are also chemical analytical results for about 60 ground-water samples. The report summarizes the geologic character, structure, and texture of the important water-bearing rock formations in the study area that extends across the Valley and Ridge, Blue Ridge, Piedmont and Coastal Plain provinces. Out-of-print.
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