No current usage?
(†Kangaroo Formation (CO) considered abandoned? Uncertain if used by the CO Geol. Survey. Abandoned by the USGS, is considered same as Belden Shale and upper part of Minturn Formation. See Belden and Minturn.)
Pennsylvanian
Named from Kangaroo Gulch, about 2 mi north of Monarch, Monarch district, Chaffee Co., central CO (Crawford, 1913).
Eagle basin
Piceance 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 ([ ]).