Usage:
Adamstown Member of Frederick Limestone (MD*)
Adamstown Member of Frederick Formation (MD*)
Geologic age:
Late Cambrian (Franconian)*
Type section, locality, area and/or origin of name:
Type section: measured section west of Lime Kiln in Frederick Valley, Frederick Co., north-central MD. Named from town of Adamstown (Reinhardt, 1974).
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 ([ ]).