USGS Visual Identifier
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Geologic Unit: Mount Simon

Usage:
Mount Simon Formation of Elk Mound Group (WI)
Mount Simon Sandstone (OH*,IL*,MO,MI,WV*,KY*)
Mount Simon Sandstone of Dresbach Group (WI*,MI*,MN*,IL*,IA*,OH*,IN*)
Mount Simon Sandstone of Elk Mound Group (WI)
Mount Simon Sandstone of Potsdam Supergroup (IN)

Age:
Cambrian, Late*









Geologic Province:
Wisconsin arch*
Illinois basin*
Iowa shelf*
Cincinnati arch*
Sioux uplift*
Michigan basin*
Appalachian basin*



Areal Extent:
WI*
OH*
IA*
IL*
MI*
MN*
IN*
WV*
KY*
MO

Type Locality:
A hill near Eau Claire, WI, which it forms (Walcott, 1914).

Unit Name History:
Named (Walcott, 1914).
Overview (Clayton and Attig, 1990; Catacosinos and Daniels, 1991; Ryder, 1992).
Extended into subsurface of WV (Ryder and others, 1996).
Revised (Nelson and others, 1996).
Extended into subsurface of KY ( Ryder and others, 1997).
Revised (Nelson, 1998).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).






U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013