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National Geologic Map Database

NGMDB

Geologic Unit: Patapsco

Usage:

Patapsco Formation (NJ*,PA*)
Patapsco Formation of Potomac Group (MD*,DC*,VA*,DE*,NJ*,PA*)


Subunits:

Informal Elk Neck beds (MD)


Geologic age:

late Early to early Late Cretaceous (Albian to Cenomanian)*


Type section, locality, area and/or origin of name:

Type area: Valley of the Patapsco River, MD (Clark, 1897).


AAPG geologic province:

Atlantic Coast basin*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).

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Page Last Modified: Tue Jun 3 16:23:31 2014