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National Geologic Map Database

Geologic Unit: Valle Grande

Usage:

Valle Grande Member of Valles Rhyolite of Tewa Group (NM*)


Geologic age:

Quaternary (Pleistocene)*


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

Type locality: Valles caldera moat, Santo Domingo Pueblo quadrangle, Sandoval Co., north-central NM (US geologic names lexicon, USGS Bull. 1520).
Named from Valle Grande, the large valley in southeastern part of Valles caldera, Sandoval Co., north-central NM (Bailey and others, 1969).


AAPG geologic province:

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 ([ ]).