Geologic Unit: Patapsco
Patapsco Formation (NJ*,PA*)
Patapsco Formation of Potomac Group (MD*,DC*,VA*,DE*,NJ*,PA*)
Type area: Valley of the Patapsco River, MD (Clark, 1897).
Informal Elk Neck beds (MD)
Unit Name History:
Named (Clark, 1897). Extended into NJ (Richards, 1962). Extended into DC (Johnson, 1962). Biostratigraphic dating (Brenner, 1963). Extended into PA (Berg and others, 1980). Overview in MD (Hansen and Drummond, 1994).
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Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.
"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().
Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).
U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
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Last modified: 15-Jan-2013