North Keys Sand (MD*)
Tertiary*
Miocene*
Vicinity of North keys, a hamlet on road from Brandywine to Naylor, in Prince Georges Co., MD. Crops out on eastern flank of upland, caps many hills between the upland and Patuxent River, and is exposed in many roadcuts (Hack, 1955).
Atlantic Coast basin*
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 ([ ]).