Usage:
Paradox Member of Hermosa Formation (CO,UT)
Paradox Formation of Hermosa Group (AZ*,CO*,NM*,UT*)
Subunits:
FORMATION STATUS: Desert Creek zone.
Geologic age:
Middle Pennsylvanian (early Desmoinesian)*
Type section, locality, area and/or origin of name:
Not designated. Named from exposures in Paradox Valley, Montrose Co., CO. Described from J.H. Shafer No. 1 well, in sec. 16, T. 27 S., R. 20 E., San Juan Co., UT (Baker and others, 1933).
Reference section (subsurface): depth-interval 5,420 to 9,600 ft, Reynolds Mining Company No. 1 Egnar well, in sec. 14, T. 43 N., R. 19 W., San Miguel Co., CO (Baars and others, 1967).
AAPG geologic province:
Black Mesa basin
San Juan basin
Paradox 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 ([ ]).