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 ([ ]).