Usage:
Happy Valley Branch Member of James Run Formation (MD*)
Geologic age:
Paleozoic, early*
Type section, locality, area and/or origin of name:
Type section: exposed from just north of Happy Valley Branch, tributary of Susquehanna River, to contact with Gilpins Falls Member about 1,220 m northwest of U.S. Interstate Highway I-95, Cecil Co., MD (Higgins, 1977).
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 ([ ]).