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National Geologic Map Database

Geologic Unit: Escabrosa

Usage:

Escabrosa Group (AZ*,NM*)
Escabrosa Limestone (AZ*,NM*)


Subunits:

GROUP STATUS (alphabetical) --all in AZ*,NM*: Hachita Formation, Keating Formation.
FORMATION STATUS (alphabetical) --all in NM*: Hachita Member, Keating Member.


Geologic age:

Early to Middle Mississippian (Tournaisian to Visean; Osagean to Meramecian)*


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

Not designated. Named from Escabrosa Ridge, Mule Mountains, Cochise Co., AZ (Ransome, 1904).
Type section stated to be "just west of Black Gap" (Hayes and Landis, 1965).
Principal reference section: near west edge of Mule Mountains, in NW/4 NE/4 sec. 9 and SW/4 SE/4 sec. 4, T. 23 S., R. 23 E., AZ (Hayes and Landis, 1965).


AAPG geologic province:

Basin-and-Range province*
Pedregosa 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 ([ ]).