List of fossiliferous stratigraphic units in Wisconsin

Group or Formation Period Notes
Black River Group/Platteville Formation Ordovician
Black River Group/Platteville Limestone Ordovician
Brandon Bridge Formation Silurian
Byron Formation Silurian
Cedar Valley Group/Little Cedar Formation Devonian
Decorah Formation Ordovician
Decorah Shale Ordovician
Dresbach Formation Cambrian
Franconia Formation Cambrian
Galena Formation Ordovician
Galena Dolomite Ordovician
Galena Group/Dubuque Formation Ordovician
Galena Group/Dunleith Formation Ordovician
Galena Group/Guttenberg Formation Ordovician
Galena Group/Ion Formation Ordovician
Galena Group/Spechts Ferry Formation Ordovician
Galena Group/Wise Lake Formation Ordovician
Glenwood Formation Ordovician
Grand Detour Formation Ordovician
Guttenberg Formation Ordovician
Ion Formation Ordovician
Jordan Sandstone Cambrian
Lake Church Formation Devonian
Manistique Formation Silurian
Maquoketa Formation Ordovician
Maquoketa Group/Brainard Shale Formation Ordovician
Maquoketa Group/Fort Atkinson Formation Ordovician
Maquoketa Group/Fort Atkinson Limestone Ordovician
Maquoketa Group/Neda Formation Ordovician
Maquoketa Group/Scales Shale Formation Ordovician
Mayville Formation Silurian
Mifflin Formation Ordovician
Milwaukee Formation Devonian
Nachusa Formation Ordovician
Oneota Formation Ordovician
Pecatonica Formation Ordovician
Platteville Formation Ordovician
Platteville Group/Grand Detour Formation Ordovician
Platteville Group/McGregor Formation Ordovician
Platteville Group/Mifflin Formation Ordovician
Platteville Group/Pecatonica Formation Ordovician
Platteville Group/Quimbys Mill Formation Ordovician
Potsdam Sandstone Cambrian
Prairie du Chien Group Ordovician
Quimbys Mill Formation Ordovician
Racine Formation Silurian
Racine Dolomite Silurian
Spechts Ferry Formation Ordovician
St. Peter Sandstone Ordovician
Trempealeau Formation Cambrian
Waukesha Formation Silurian
Waukesha Dolomite Silurian

See also

References

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