Usage:
Smithville Dolomite (IL*,MO*)
Smithville Formation (AR*,IL*,MO*)
Subunits:
Black Rock Limestone Member (AR*).
Geologic age:
Ordovician, Early*
Canadian*
Type section, locality, area and/or origin of name:
Notable exposures at and around Smithville, Lawrence Co., northern AR (Branner, 1929).
AAPG geologic province:
Ozark uplift*
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 ([ ]).