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Geologic units in Ingham county, Michigan

Saginaw Formation (Pennsylvanian) at surface, covers 90 % of this area

Saginaw Formation

Michigan Formation (Mississippian) at surface, covers 3 % of this area

Michigan Formation

Bayport Limestone (Mississippian) at surface, covers 3 % of this area

Bayport Limestone

Marshall Sandstone (Mississippian) at surface, covers 2 % of this area

Marshall Sandstone

Grand River Formation (Pennsylvanian) at surface, covers 0.8 % of this area

Grand River Formation

Coldwater Shale (Mississippian) at surface, covers 0.5 % of this area

Coldwater Shale

Red beds (Jurassic) at surface, covers < 0.1 % of this area

Red beds