Usage:
Rawls Formation (TX-recognized locally in southwestern TX, notably Bofecillos Mountains, Big Bend Ranch State Park, Trans-Pecos area)
[?] Rawls Basalt of [†?]Bofecillos Group (TX)
[?] Rawls Formation of [†?]Bofecillos Group (TX)
[?] Rawls Basalt of Buck Hill Group (TX)
Subunits:
(alphabetical) --all in TX: Alazan Lavas Member, Las Burras Lavas Member, Leyva Canyon Member, Rancho Viejo Tuff Member, Saucedo Lavas Member, Segundo Lavas Member.
Geologic age:
Tertiary
Oligocene
Miocene
Type section, locality, area and/or origin of name:
Named from Rawls Ranch on Tascotal Mesa, Tascotal quadrangle, Presidio Co., southwestern TX (Goldich and Seward, 1948).
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 ([ ]).