Usage:
Sierra Ladrones Formation of Santa Fe Group (NM*-recognized locally in type area)
Geologic age:
late Tertiary to Quaternary (Pliocene to Pleistocene)*
Type section, locality, area and/or origin of name:
Type area in Sevilleta National Wildlife Refuge, San Acacia 7.5-min quadrangle, Socorro Co., central NM: (1) piedmont slope and alluvial fan deposits, west of Sierra Ladrones from Rio Salado to north bdry of Sevilleta Grant, (2) axial stream deposits, near Loma Blanca, and (3) piedmont slope and alluvial flat deposits, north and east of San Acacia dam. Named from Sierra Ladrones, low foothills of the Ladron Mountains, Sevilleta National Wildlife Refuge, San Acacia 7.5-min quadrangle, Socorro Co., central NM (Machette, 1978).
AAPG geologic province:
Orogrande 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 ([ ]).