Usage:
Log Springs Formation (NM*)
Geologic age:
Late Mississippian (Chesterian)*
Type section, locality, area and/or origin of name:
Type section: in Penasco Canyon, Nacimiento Mountains, in NW/4 SE/4 sec. 5, T. 16 N., R. 1 E., Sandoval Co., NM. Named from Log Springs in Penasco Canyon (Armstrong, 1955).
AAPG geologic province:
San Juan basin*
Estancia 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 ([ ]).