Usage:
Libertytown Metarhyolite (MD*)
Geologic age:
Paleozoic, early*
Cambrian, Late
Type section, locality, area and/or origin of name:
Not designated. Named from Libertytown, Frederick Co., MD. Occurs in belt that lies south and southwest of Union Bridge and north of U.S. Highway 40. Eastern part of belt extends into Carroll Co. to vicinity of McKinstry's Mill (Stose and Stose, 1946).
AAPG geologic province:
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 ([ ]).