Usage:
Lock Haven Formation of Susquehanna Group (PA*)
Lock Haven Formation (PA)
Subunits:
Minnehaha Springs Member (PA)
Geologic age:
early Late Devonian (Frasnian)*
Type section, locality, area and/or origin of name:
Type section: exposure along Queens Run Road, from borrow pit 1.5 km northwest of Susquehanna River (West Branch) bridge at Lock Haven, 1.5 km northwest to lower slopes of Simcox Mountain, north of junction of Queens Run and Swissdale Roads, Lock Haven quadrangle, Clinton Co., PA (Faill and Wells, 1977)
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 ([ ]).