List of fossiliferous stratigraphic units in Iowa

Group or Formation Period Notes
Altamont Formation Carboniferous
Blanding Formation Silurian
Brainard Formation Ordovician
Bronson Group/Dennis Formation Carboniferous
Burlington Limestone Carboniferous
Cedar Valley Group/Coralville Formation Devonian
Cedar Valley Group/Linwood Formation Devonian
Cedar Valley Group/Lithograph City Formation Devonian
Cedar Valley Group/Little Cedar Formation Devonian
Cedar Valley Group/Shell Rock Formation Devonian
Chapin Formation Carboniferous
Cherokee Group Carboniferous
Coralville Formation Devonian
Dakota Formation Cretaceous
Decorah Shale Ordovician
Dennis Formation Carboniferous
Dewey Formation Carboniferous
Dunleith Formation Ordovician
English River Formation Carboniferous
Galena Dolomite Ordovician
Galena Group/Cummingsville Formation Ordovician
Galena Group/Decorah shale 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
Gilmore City Limestone Carboniferous
Glenwood Formation Ordovician
Gower Formation Silurian
Grand Detour Formation Ordovician
Graneros Shale Cretaceous
Guttenberg Formation Ordovician
Hackberry Group/Lime Creek Formation Devonian
Hampton Formation Carboniferous
Hopkinton Dolomite Silurian
Independence Shale Devonian
Iola Formation Carboniferous
Ion Formation Ordovician
Kansas City Group/Swope Formation Carboniferous
Keokuk Limestone Carboniferous
LaPorte City Formation Silurian
Lecompton Formation Carboniferous
Lime Creek Formation Devonian
Lost Branch Formation Carboniferous
Maquoketa Group Ordovician
Maquoketa Group/Brainard Shale Ordovician
Maquoketa Group/Fort Atkinson Limestone Ordovician
Maquoketa Group/Neda Formation Ordovician
Maquoketa Group/Scales Shale Ordovician
Marmaton Group/Labette Carboniferous
Maynes Creek Formation Carboniferous
McCraney Limestone Carboniferous
Mifflin Formation Ordovician
Mosalem Formation Silurian
Nachusa Formation Ordovician
North Hill Group/English River Devonian
Oneota Formation Ordovician
Pawnee Formation Carboniferous
Pecatonica Formation Ordovician
Pella Formation Carboniferous
Platteville Group/Grand Detour Formation Ordovician
Platteville Group/Mifflin Formation Ordovician
Platteville Group/Pecatonica Formation Ordovician
Platteville Group/Quimbys Mill Formation Ordovician
Prosser Limestone Ordovician
Quimbys Mill Formation Ordovician
Racine Formation Silurian
Saturday Mountain Formation Ordovician
Scotch Grove Formation Silurian
Shawnee Group/Deer Creek Limestone Carboniferous
Shawnee Group/Kanwaka Formation Carboniferous
Shawnee Group/Oread Limestone Carboniferous
Shell Rock Formation Devonian
Spechts Ferry Formation Ordovician
Spillville Formation Devonian
St. Louis Formation Carboniferous
St. Peter Sandstone Ordovician
Stanton Formation Carboniferous
Stewartville Formation Ordovician
Swope Formation Carboniferous
Traverse Group/Cedar Valley Formation Devonian
Wapsipinicon Formation Devonian
Warsaw Formation Carboniferous
Wassonville Formation Carboniferous
Wise Lake Formation Ordovician
Yellow Springs Group/Sheffield Formation Devonian

See also

References

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