Usage:
Purcell Limestone Member of Marcellus Shale (PA*,NY*,MD*,WV*,VA)
Purcell Member of Marcellus Formation (PA,WV*)
Purcell Member of Millboro Shale (VA)
Geologic age:
early Middle Devonian (Eifelian)*
Type section, locality, area and/or origin of name:
Type section: Should be Morris No. 1 well, Purcell gas field, Bedford Co., PA (Cate, 1963).
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 ([ ]).