Usage:
Crystal River Siltstone Member of Gothic Formation (CO)
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Crystal River valley, about 6 mi (9.6 km) north of Redstone, a few hundred ft (m) west of CO Highway 133, on southeast-facing slopes of ridge south of Perham Creek and opposite Avalanche Creek Road, in sec. 20, T. 9 S., R. 88 W., Pitkin Co., CO. Named from Crystal River (Bartleson, 1972).
AAPG geologic province:
Eagle 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 ([ ]).