Usage:
Fountain Formation (CO*,WY*)
Subunits:
Glen Eyrie Shale Member (CO*).
Geologic age:
Pennsylvanian, Early
Morrowan
Pennsylvanian, Middle*
Pennsylvanian, Late*
Permian, Early*
Type section, locality, area and/or origin of name:
Typical development on Fountain Creek below Manitou Springs [in Colorado Springs quadrangle] and at head of same stream in northeast corner of Pikes Peak quadrangle, [El Paso Co.], eastern CO (Cross, 1894).
AAPG geologic province:
Las Animas arch*
Powder River basin*
Denver 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 ([ ]).