Usage:
Rinconada Formation of /Hondo Group (NM-recognized locally in Tusas Mountains area)
[Hondo Group preempted by Hondo Sandstone Member of Lang (1937) in NM.]
Geologic age:
late Paleoproterozoic
Type section, locality, area and/or origin of name:
Named from settlement of Rinconada 2 mi north of Dixon in the Rio Grande Canyon, [Canon del Rio Grande, Velarde 7.5-min quadrangle, Rio Arriba Co., Carson National Forest area, central northern NM] (Just, 1937; Montgomery, 1953).
Principal reference section (Hondo Group): Hondo Canyon area, in secs. 29 and 32, T. 24 N., R. 12 E., Taos SW 7.5-min quadrangle, Taos Co., northern Picuris Mountains, [Carson National Forest area], central northern NM (Bauer and Williams, 1989).
Reference section: in Rattlesnake Canyon south of Copper Hill, southern Picuris Mountains, near bdry. btw. secs. 19 and 20, T. 23 N., R. 11 E., Trampas 7.5-min quadrangle, [Taos Co., Carson National Forest area], central northern NM (Bauer and Williams, 1989).
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 ([ ]).