USGS Visual Identifier
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Geologic Unit: Manistique

Manistique Dolomite (MI*,WI*)
Manistique Formation (MI*,WI)
Manistique Group (MI)

Silurian, middle*

Geologic Province:
Michigan basin*

Areal Extent:

Type Locality:
Exposures at Manistique, Schoolcraft Co., northern MI (Smith, 1916).

Unit Name History:
Named (Snith, 1916). Overview (Frey, 1995).

Note: If you need more information, please contact Nancy Stamm (
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
Database project personnel
Last modified: 15-Jan-2013