No current usage.
(†Lufkin beds in Claiborne group (TX) abandoned. Same as Yegua formation. See Yegua.)
early Tertiary (middle Eocene)
Named from Lufkin, Angelina Co., eastern TX (US geologic names lexicons, USGS Bull. 896, 1200).
East Texas 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 ([ ]).