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National Geologic Map Database

Geologic Unit: Angola

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).