No current usage.
(†Proctor Dolomite (KS*,MO*) considered same as upper part of Eminence Dolomite. See Eminence.)
Late Cambrian (early Ibexian)*
Named from exposures on Proctor Creek, Morgan Co., central MO (US geologic names lexicons, USGS Bull. 896, 1200).
Ozark uplift*
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 ([ ]).