Usage:
No current usage?
(†/Huerfano Sand Member of Gallup Sandstone (NM-subsurface) considered abandoned? Uncertain if used by the NM Geol. Survey. Not used by the USGS.)
[Preoccupied. Name previously applied to Huerfano Formation by Hill (1888) in CO.]
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Type section (subsurface): Standard of Texas No. 9-1 Huerfano well, in SW/4 SW/4 sec. 1, T. 24 N., R. 10 W., San Juan Co., NM (Sabins, 1963).
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 ([ ]).