Usage:
Alamitos Formation of Madera Group (NM*-notable exposures in Sangre de Cristo Mountains)
Geologic age:
Late Pennsylvanian*
Type section, locality, area and/or origin of name:
Primary type section (upper part of formation): in Alamitos Canyon, Pecos area, San Miguel Co., north-central NM, about 25 mi west of Las Vegas, NV (Sutherland, 1963).
Secondary type section (lower part of formation): on ridge between Pecos Valley and Alamitos Canyon, Pecos area, San Miguel Co., north-central NM (Sutherland, 1963).
Reference section (section K): measured in roadcuts and hogback ridges just north of Highway 3 northwest and northeast of St. Joseph Church, southeastern Sangre de Cristo Mountains, Mora and San Miguel Cos., north-central NM (Baltz and Meyers, 1999).
AAPG geologic province:
Las Vegas-Raton basin*
Palo Duro 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 ([ ]).