Usage:
Potosi Dolomite (IL*,IN, MO*)
Potosi Dolomite of Knox Group (KY*, and IL*-notably in southern part)
Potosi Dolomite of Arbuckle Group (MO*,OK*, and KS*-subsurface)
Potosi Formation (MO*,IL*)
Geologic age:
Late Cambrian (Croixan)*
Type section, locality, area and/or origin of name:
Named from Potosi, [Potosi 7.5-min quadrangle], Washington Co., eastern MO (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Chautauqua platform*
Cherokee basin*
Illinois basin*
Ozark uplift*
Upper Mississippi embayment*
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 ([ ]).