Usage:
Dale Summit Member of Bellefonte Formation of Beekmantown Group (PA)
Geologic age:
Middle Ordovician (Whiterockian)
Type section, locality, area and/or origin of name:
Notable exposures around town of Dale Summit, Nittany Valley, [State College 7.5-min quadrangle], Centre Co., central PA (Swartz and others, 1955).
AAPG geologic province:
Appalachian 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 ([ ]).