Usage:
Bearhead Rhyolite of Keres Group (NM*)
Subunits:
Peralta Tuff Member.
Geologic age:
late Tertiary (late Miocene)*
Type section, locality, area and/or origin of name:
[Type locality:] exposures on Bearhead Peak, Jemez Mountains, Santo Domingo Pueblo quadrangle, Sandoval Co., north-central NM, one of the larger source vents of the formation (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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).