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National Geologic Map Database

Geologic Unit: Naco

Usage:

Naco Group (AZ*,NM*)
Naco Formation (AZ*)
Naco Limestone (AZ*)


Subunits:

GROUP STATUS (alphabetical): Black Prince Limestone (AZ), Chiricahua Limestone (AZ,NM), Colina Limestone (AZ*,NM*), Concha Limestone (AZ*,NM*), Earp Formation (AZ*,NM*), Epitaph Dolomite (AZ*,NM*), Horquilla Limestone (AZ*,NM*), Rainvalley Formation (AZ*,NM*), Scherrer Formation (AZ*,NM*).


Geologic age:

Pennsylvanian, Middle* to Permian, Early*


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

Not designated. Named from Naco Hills, Bisbee 15-min quadrangle, Cochise Co., AZ (Ransome, 1904).


AAPG geologic province:

Pedregosa basin*
Basin-and-Range province*
Black Mesa basin*
Plateau sedimentary 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).