Usage:
Ocotillo Silt Member of Tansill Formation of Artesia Group (NM,TX)
Geologic age:
Middle Permian (Guadalupian)
Type section, locality, area and/or origin of name:
Type locality (of Tansill Formation): on Carlsbad-Artesia Highway (U.S. 285), 3.7 mi from Eddy County Courthouse in Carlsbad, in W/2 sec. 26, T. 21 S., R. 26 E., of NM Principal Meridian, [Carlsbad West 7.5-min quadrangle], Eddy Co., southeastern NM (DeFord and Riggs, 1941).
Named from Ocotillo Hills, prominent topographic feature northwest of Carlsbad, [Carlsbad West 7.5-min quadrangle, Eddy Co.], southeastern NM (DeFord and Riggs, 1941).
AAPG geologic province:
Permian 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 ([ ]).