Usage:
Angola Shale of West Falls Group (NY)
Angola Shale Member of West Falls Formation (KY*,NY*,OH*,PA*,TN*,VA*,WV*)
Angola Shale Member of Chattanooga Shale (VA)
Geologic age:
Late Devonian (Frasnian)*
Type section, locality, area and/or origin of name:
Named from Angola, Erie Co., west-central NY, where it is exposed along Big Sister Creek (Hartnagel, 1912).
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 ([ ]).