Usage:
Coalbank Hill Member of Molas Formation (CO)
Geologic age:
Early Pennsylvanian (Morrowan)
Type section, locality, area and/or origin of name:
[Type locality]: exposures on Coalbank Hill on U.S. Highway 550, 33 mi north of Durango, San Juan Co., CO (Merrill and Winar, 1958).
AAPG geologic province:
San Juan Mountains province
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 ([ ]).