Usage:
Mount Simon Formation of Elk Mound Group (WI)
Mount Simon Sandstone (IL*,KY*,MI,MO,OH*,WV*)
Mount Simon Sandstone of Dresbach Group (IL*,IN*,IA*,MI*,MN*,OH*,WI*)
Mount Simon Sandstone of Elk Mound Group (WI)
Mount Simon Sandstone of Potsdam Supergroup (IN)
Geologic age:
Late Cambrian*
Type section, locality, area and/or origin of name:
Near Eau Claire, WI, where it forms an escarpment [called Mount Simon] (Walcott, 1914; Thwaites, 1923).
AAPG geologic province:
Wisconsin arch*
Illinois basin*
Iowa shelf*
Cincinnati arch*
Sioux uplift*
Michigan basin*
Appalachian 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 ([ ]).