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National Geologic Map Database

Geologic Unit: Organ Rock

Usage:

Organ Rock Tongue of Cutler Formation (AZ*,UT*)
Organ Rock Shale Tongue of Cutler Formation (NM)
Organ Rock Member of Cutler Formation (AZ*,UT*)
Organ Rock Formation of Cutler Group (AZ*,CO*,NM*,UT*)
Organ Rock Shale (AZ,NM,UT)


Geologic age:

Permian, Early*


Type section, locality, area and/or origin of name:

Not designated. Named from natural monument known as Organ Rock, south of San Juan River between Moonlight and Copper Creeks, San Juan Co., UT (Baker and Reeside, 1929).


AAPG geologic province:

Paradox basin*
Black Mesa basin*
San Juan 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).