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National Geologic Map Database

Geologic Unit: Bryn Mawr

Usage:

Bryn Mawr Formation (DE,PA)
Bryn Mawr Gravel (DE*,DC*,MD*,PA*)


Geologic age:

Tertiary*
Pliocene(?)*
Miocene(?)
Oligocene


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

Near Bryn Mawr, Delaware and Montgomery Cos., PA (Lewis, 1881).


AAPG geologic province:

Atlantic Coast basin*
Piedmont-Blue Ridge province*


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).