No current usage.
(Archimedes limestone (informal) (AR,IL,MO,OK) abandoned and replaced with Palestine Sandstone (IL), Ste. Genevieve Limestone (MO,IL), Warsaw Limestone (MO,IL), Keokuk Limestone (MO,IL) and Pitkin Limestone (AR,OK). See Palestine, Ste. Genevieve, Warsaw, Keokuk, and Pitkin.)
Named from the fossil ARCHIMEDES (Simonds, 1891).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).