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National Geologic Map Database

Geologic Unit: Box

Usage:

Box Member of Percha Shale (NM*)
Box Member of Percha Formation (NM*)


Geologic age:

late Late Devonian (Famennian)*


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

Named from "The Box," the narrow canyon in Mimbres Mountains through which Percha Creek flows eastward into Rio Grande, 2.5 mi southeast of Hillsboro, in SW/4 SW/4 SE/4 sec. 14, T. 16 S., R. 7 W., Sierra Co., southwestern NM (Stevenson, 1945).


AAPG geologic province:

Pedregosa basin*
Orogrande basin*
Basin-and-Range 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 ([ ]).