Chronostratigraphy of Michigan

Ph

Cz

Q

Pleistocene

indet.	Glacial till

Mz

J

indet.	Ionia Formation

Pz

C

⁋

indet.

Parma Sandstone

M

D

Upper

indet.	Antrim Shale Bedford Shale Berea Sandstone Ellsworth Shale
Frasnian	Squaw Bay Limestone

Middle

Givetian	Squaw Bay Limestone

Lower

Garden Island Formation

S

indet.	Bertie Formation Byron Formation Bush Bay Formation Cordell Formation Hendricks Formation Lime Island Formation Pointe aux Chenes Formation Put-in-Bay Dolomite Raisin River Dolomite Rapson Creek Formation Rockview Formation Salina Group Schoolcraft Formation St. Ignace Dolomite
Llandovery	Cabot Head Shale Manitoulin Dolomite

O

Upper

Sandbian	Bill's Creek Shale

Middle

Darriwilian	Bill's Creek Shale

Lower

Au Train Formation

Є

Munising Formation

pЄ

♇	Copper Harbor Conglomerate Freda Sandstone Jacobsville Sandstone Nonesuch Shale

References

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[1]

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