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The Thunder Bay Limestone is a geologic formation in Michigan. It preserves 
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the Devonian
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ...
period.
Fossil content
Vertebrates
Conodonts
Placoderms
Invertebrates
Brachiopods
Cnidarians
Echinoderms
Trilobites
See also
*List of fossiliferous stratigraphic units in Michigan
This article contains a list of fossil-bearing stratigraphic units in the state of Michigan, U.S.
Sites
See also
* Paleontology in Michigan
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Michigan
Michigan
Stratigraphi ...
References
* Devonian Michigan Middle Devonian Series {{Michigan-geologic-formation-stub