Difference between revisions of "Template:Chronostratigraphy of Wisconsin"
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imported>J. Spencer (revision of the Ordovician has put many "Middle" Ordovician units into the Late Ordovician, the base of which is now dated to 458.4 Ma (the basal Decorah is almost pegged to the Deicke K-Bentonite of about 454.6 Ma)) |
imported>Tknifton |
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| Line 288: | Line 288: | ||
| Middle Ordovician = | | Middle Ordovician = | ||
| − | + | * [[Pecatonica Formation]] | |
* [[St. Peter Sandstone|St. Peter Formation]] (in part) | * [[St. Peter Sandstone|St. Peter Formation]] (in part) | ||