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National Geologic Map Database

Geologic Unit: Gray Mesa

Usage:

Gray Mesa Formation of Madera Group (NM*)
Gray Mesa Member of Madera Limestone of Magdalena Group (NM*-notable exposures in Lucero Mesa area)
[†Magdalena Group not used by the NM Geol. Survey.]


Geologic age:

Middle Pennsylvanian*


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

[Principal reference section]: measured on east-facing escarpment of Mesa Aparejo [formerly known as Gray Mesa], in SE/4 sec. 14, T. 5 N., R. 3 W., UTM Zone 13S, base at 306245m E., 3836323m N., top at 305539m E., 3836685m N., [approx. Lat. 34 deg. 39 min. 17 sec. N., Long. 107 deg. 07 min. 15 sec. W., southwestern corner Mesas Mojinas 7.5-min quadrangle], Valencia Co., central NM (Krainer and Lucas, 2004).
[Named from excellent exposures along Gray Mesa (now Mesa Aparejo), Valencia Co., central NM by Kelley and Wood (1946).]


AAPG geologic province:

Orogrande 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 ([ ]).