Usage:
Shawnee Island Member of Coeymans Formation of Helderberg Group (NJ*,PA*)
Geologic age:
Early Devonian*
Type section, locality, area and/or origin of name:
Type section: in cut along northwest side of road, 0.6 mi southwest of Shawnee on Delaware, in southwest corner of Bushkill 7.5-min quadrangle [approx. Lat. 41 deg. 0.5 min. N., Long. 75 deg. 6.92 min. W., Monroe Co., PA (A.G. Harris, written commun., ca. 1995)]. Named from Shawnee Island in the Delaware River, Monroe Co., PA (Epstein and others, 1967).
Reference section: in woods on northeast side of secondary road along ascent of Wallpack Ridge in PA, immediately southwest of where the Delaware River cuts through the ridge, Flatbrookville quadrangle (Epstein and others, 1967).
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 ([ ]).