Geologic formation in Iowa, United States.
The St. Louis Formation is a geologic formation in Iowa. It preserves fossils dating back to the Carboniferous period.
See also
References
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Cenozoic chronostratigraphy of Colorado |
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Mesozoic chronostratigraphy of Colorado |
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Paleozoic chronostratigraphy of Colorado |
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Precambrian chronostratigraphy of Colorado |
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