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Cummingsville Formation
Geologic formation in Iowa, United States. / From Wikipedia, the free encyclopedia
The Cummingsville Formation is a geologic formation in Iowa and Minnesota. It preserves fossils dating back to the Ordovician period.
Quick Facts Type, Overlies ...
Cummingsville Formation | |
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Stratigraphic range: Ordovician | |
![]() 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 |
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