Usage:
Alsate Shale (TX*)
Geologic age:
early Middle Ordovician*
Type section, locality, area and/or origin of name:
Named from Alsate Creek, which joins Pena Colorada Creek from west at Fort Pena Colorada. Is well exposed in cut on creek 2.5 mi west-southwest of Fort Pena, near road to Roberts Ranch, Brewster Co., southwestern TX (King, 1931).
AAPG geologic province:
Permian 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 ([ ]).