National Geologic Map Database
Product Description Page
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Title: Preliminary geologic map, District of Columbia
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Author(s): Froelich, A.J., and Hack, J.T.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Open-File Report OF-75-537
- Publication Date: 1975
- Map Scale: 1:24,000
- Cross Section: None
- North Latitude: 38° 59' 46" N (38.9960)
- South Latitude: 38° 47' 30" N (38.7917)
- East Longitude: 76° 54' 50" W (-76.9140)
- West Longitude: 77° 7' 1" W (-77.1170)
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.