Usage:
Fasken Formation of Wristen Group (NM,TX)
Geologic age:
Silurian (Llandovery to Ludlow)
Type section, locality, area and/or origin of name:
Not designated. Present in subsurface. Origin of name not stated by author, but probably named from Standard Oil of Texas Fasken 5 No. 1 well, Andrews Co. (near Lea Co., NM), west-central TX (Ruppel, 1993).
Reference sections (subsurface): Standard of Texas Fasken 5 No. 1 well, Andrews Co., TX; Amoco Univ. Consolidated V No. 12 well, and Amoco Univ. Consolidated VII No. 20 well, both in Fullerton field (Ruppel and Holtz, 1994).
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 ([ ]).