No current usage.
(†/Dixon Formation (KY) replaced with Henshaw Formation [†Henshaw later replaced with Mattoon Formation]. See Mattoon.)
[Preoccupied. Name previously applied to Dixon Clay by Foerste (1903) in TN.]
Late Pennsylvanian (Missourian to Virgilian)
Named from exposures near Dixon, Webster Co., western KY (US geologic names lexicons, USGS Bull. 896, 1200).
Illinois 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 ([ ]).