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)
(alphabetical) --all in TX: Alazan Lavas Member, Las Burras Lavas Member, Leyva Canyon Member, Rancho Viejo Tuff Member, Saucedo Lavas Member, Segundo Lavas Member.
Tertiary
Oligocene
Miocene
Named from Rawls Ranch on Tascotal Mesa, Tascotal quadrangle, Presidio Co., southwestern TX (Goldich and Seward, 1948).
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 ([ ]).