Template:Paleozoic Stratigraphy of the Upper Midwest
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Paleozoic Stratigraphy of the Upper Midwest, USA |
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Dates approximate |
Maquoketa Group (446–440 Ma) |
Galena Group (454–446 Ma) |
|
Platteville Limestone (455–454 Ma) |
Glenwood Shale (~455 Ma) |
St. Peter Sandstone (~459–~455 Ma) |
Knox supergroup |
See also
- {{Paleozoic Footer}}
Note on Sources