Английская Википедия:Cummingsville Formation
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Шаблон:Short description Шаблон:Infobox rockunit
The Cummingsville Formation is a geologic formation in Iowa and Minnesota. It preserves fossils dating back to the Ordovician period.
See also
References
Шаблон:Chronostratigraphy of Minnesota
Шаблон:Iowa-geologic-formation-stub
Шаблон:Ordovician-stub