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National Geologic Map Database

Geologic Unit: La Tuna

Usage:

La Tuna Formation (NM)
La Tuna Member of Magdalena Formation (NM*,TX*-notable exposures in Franklin Mountains)
[†Magdalena Formation not used by the NM Geol. Survey.]


Geologic age:

Early to Middle Pennsylvanian (Morrowan to Atokan)*


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

Named from town of La Tuna [now Anthony], on Santa Fe RR at TX-NM line, [Canutillo 7.5-min quadrangle], northernmost El Paso Co., western TX (see Nelson, 1940).
[Type locality:] in Vinton Canyon, 2 to 3 mi east of Westway on western flank of Franklin Mountains, [approx. Lat. 31 deg. 58 min. 00 sec. N., Long. 106 deg. 31 min. 30 sec. W., Canutillo 7.5-min quadrangle], El Paso Co., western TX (see Nelson, 1940; Harbour, 1972).


AAPG geologic province:

Orogrande 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 ([ ]).