Mineral Resources
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Geology
by state
Michigan geologic units
Geologic units in Ogemaw county, Michigan
Michigan Formation
(Mississippian)
at surface, covers 69 % of this area
Michigan Formation
Marshall Sandstone
(Mississippian)
at surface, covers 14 % of this area
Marshall Sandstone
Coldwater Shale
(Mississippian)
at surface, covers 13 % of this area
Coldwater Shale
Saginaw Formation
(Pennsylvanian)
at surface, covers 3 % of this area
Saginaw Formation
Red beds
(Jurassic)
at surface, covers 0.5 % of this area
Red beds
Bayport Limestone
(Mississippian)
at surface, covers < 0.1 % of this area
Bayport Limestone