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National Geologic Map Database

Geologic Unit: Beaverdam

Usage:

Beaverdam Formation (DE*)
Beaverdam Sand (DE*,MD*)


Geologic age:

late Tertiary (late Pliocene)*; possibly late Miocene to early Pleistocene*


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

Reference locality (subsurface): test hole Wi-Cf 63, 2 mi east of Salisbury, [Salisbury 7.5-min quadrangle], Wicomico Co., southeastern MD. Crops out in banks and roadcuts surrounding Schumaker Pond, [Salisbury 7.5-min quadrangle, Wicomico Co., southeastern MD]. Named from Beaverdam Creek, east branch of Wicomico River, because of its prominent occurrence in and beneath drainage basin of that stream (Rasmussen and Slaughter, 1955; see also Ramsey, 2010).


AAPG geologic province:

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 ([ ]).