Geologic formation in Iowa, United States.
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 |
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Overlies | Decorah Shale |
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Location |
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Country | United States |
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Extent | Iowa and Minnesota |
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The Cummingsville Formation is a geologic formation in Iowa and Minnesota. It preserves fossils dating back to the Ordovician period.
See also
- Earth sciences portal
- Iowa portal
- Paleontology portal
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
Chronostratigraphy of Minnesota
Ph | Cz | Q | - Glacial and post-glacial unconsolidated deposits
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Mz | K | Upper | - Coleraine Formation
- Windrow Formation
- unnamed Upper? Cretaceous formations, western and southeastern Minnesota
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Pz | |
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pЄ | ♇ | Y | - Fond du Lac Formation
- Hinckley Sandstone
- North Shore Volcanic Group
- Puckwunge Conglomerate
- Solor Church Formation (subsurface only)
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X | - Trommald Formation
- Virginia Formation
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