Usage:
Shady Grove Formation of Conococheague Group (PA*)
Originally misspelled Shadygrove.
Geologic age:
Late Cambrian*
Type section, locality, area and/or origin of name:
Type section: in farm fields, 0.6 mi south and slightly east of hamlet of Shadygrove [Shady Grove] on State Highway 16, [from approx. Lat. 39 deg. 46 min. 10 sec. N., Long. 77 deg. 40 min. 07 sec. W. to Lat. 39 deg. 46 min. 15 sec. N., Long. 77 deg. 40 min. 30 sec. W., Greencastle 7.5-min quadrangle], Franklin Co., southern PA. Named from [Shady Grove] (Root, 1968).
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 ([ ]).