Usage:
Fort Hays Limestone Member of Niobrara Formation (CO*,KS*,NE*,NM*,SD*,WY*)
Fort Hays Limestone Member of Mancos Shale (CO*)
Also called Hays in some early reports.
Geologic age:
Late Cretaceous (Turonian to Coniacian)*
Type section, locality, area and/or origin of name:
Named from old Fort Hays, a well-known landmark [just southwest of Hays, Ellis Co.], western KS (Williston, 1893).
AAPG geologic province:
Anadarko basin*
Central Kansas uplift*
Denver basin*
Las Vegas-Raton basin*
North Park basin*
Piceance basin*
Salina 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 ([ ]).