Usage:
Dyer Member of Chaffee Formation (CO*)
Dyer Dolomite of Chaffee Group (CO*)
Dyer Formation of Chaffee Group (CO)
Subunits:
FORMATION STATUS (alphabetical) --all in CO: Broken Rib Member, Coffee Pot Member.
Geologic age:
Late Devonian or Early Mississippian(?)*
Type section, locality, area and/or origin of name:
Named from exposures on West Dyer and Dyer Mountains, 5 mi east of Leadville, Lake Co., CO (Behre, 1932).
AAPG geologic province:
Eagle basin*
South Park basin*
Piceance basin*
Green River 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 ([ ]).