Cummingsville Formation

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Cummingsville Formation
Stratigraphic range: Ordovician
Cummingsville Formation Decorah Iowa.jpg
Cummingsville Formation in Decorah, Iowa. The Cummingsville is the brown upper unit; the Decorah Shale is below.
Type Formation
Overlies Decorah Shale
Location
Country United States
Extent Iowa and Minnesota

The Cummingsville Formation is a geologic formation in Iowa and Minnesota. It preserves fossils dating back to the Ordovician period.

See also

References