Usage:
Troublesome Formation (CO*)
Geologic age:
late Oligocene and early Miocene*
Type section, locality, area and/or origin of name:
Named from occurrence in valley of Troublesome Creek, near Kremmling in Middle Park, Grand Co., northwestern CO. Covers about 160 sq mi (Lovering and Goddard, 1950).
Reference section: in lower Barger Gulch, in SW/4 sec. 24, T. 1 N., R. 80 W., and SW/4 sec. 19, T. 1 N., R. 79 W., Kremmling 15-min quadrangle [Junction Butte 7.5-min quadrangle], Grand Co., northwestern CO (Izett, 1968).
AAPG geologic province:
North Park 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 ([ ]).