No current usage?
(†Dugout Clay or †Dugout Gravel (TX) considered abandoned? Uncertain if used by the TX Geol. Survey. Not used by the USGS.)
Tertiary
Miocene
Pliocene
Not designated. First used in vicinity of Dugout wells northwest of Boquillas, southern Brewster Co., TX (Udden, 1907).
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 ([ ]).