Usage:
San Pedro Arroyo Formation of Chinle Group (NM)
Subunits:
Ojo Huelos Member (NM).
Geologic age:
Triassic, Late
Carnian, late
Type section, locality, area and/or origin of name:
Type section: broad outcrop belt in arroyo and beyond, north of Carthage, Socorro Co., central NM (Lucas, 1991).
AAPG geologic province:
Orogrande basin
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 ([ ]).