Usage:
No current usage.
(†Vallecitos Rhyolite (NM) replaced with Burned Mountain Metarhyolite. See Burned Mountain.)
Geologic age:
late Paleoproterozoic
Type section, locality, area and/or origin of name:
Notable exposures in mountainous area btw. towns of Petaca and Vallecitos, [La Madera and Las Tablas 7.5-min quadrangles], Rio Arriba Co., central northern NM (Just, 1937).
AAPG geologic province:
Southern Rocky Mountain region
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).