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Geological Formations
The Thunder Bay Limestone is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
Stratigraphy of the Devonian deposits of the northern part of the Lower Peninsula of Michigan, showing the Thunder Bay Limestone[1]
Fossil content[edit]
Vertebrates[edit]
Conodonts[edit]
Conodonts reported from the Thunder Bay Limestone
|
Genus |
Species |
Presence
|
Material |
Notes |
Images
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Icriodus
|
I. cymbiformis
|
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[2]
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Also found in the Detroit River, Traverse, Antrim, Ferron Point, Genshaw, Alpena and Norway Point formations.
|
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I. expansus
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[2]
|
Also found in the Detroit River, Traverse, Antrim, Lucas, Anderdon, Dundee, Bell, Ferron Point, Genshaw, Alpena, Potter Farm and Norway Point formations.
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I. latericrescens latericrescens
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[2]
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Also found in the Traverse, Bell, Ferron Point, Genshaw, Newton Creek, Alpena, Four Mile Dam,,Norway Point and Potter Farm formations.
|
|
Polygnathus
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P. varcus
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[2]
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Also found in the Traverse, Antrim, Alpena, Four Mile Dam and Norway Point formations.
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|
Placoderms[edit]
Placoderms reported from the Thunder Bay Limestone
|
Genus |
Species |
Presence
|
Material |
Notes |
Images
|
Ptyctodus
|
P. sp.
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"Northeast shore of Partridge Point, 6.4 kilometers south of Alpena".[1]
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A tooth plate (UMMP 3023).[1]
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A ptyctodontid.
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|
Invertebrates[edit]
Brachiopods[edit]
Cnidarians[edit]
Echinoderms[edit]
Trilobites[edit]
See also[edit]
References[edit]
- ^ a b c d e f Stack, Jack; Sallan, Lauren (2018-09-20). "An examination of the Devonian fishes of Michigan". PeerJ. 6 (2). doi:10.7717/peerj.5636. PMC 6151260.
- ^ a b c d Orr, R. William (1971). "Conodonts from Middle Devonian Strata from the Michigan Basin".
- ^ a b Imbrie, John (1959). "Brachiopods of the Traverse group (Devonian) of Michigan. Part 1, Dalmanellacea, Pentameracea, Strophomenacea, Orthotetacea, Chonetacea, and Productacea. Bulletin of the AMNH ; v. 116, article 4".
- ^ Watkins, J. Lloyd (1959). "Middle Devonian Auloporid Corals from the Traverse Group of Michigan". Journal of Paleontology. 33 (5): 793–808. ISSN 0022-3360.
- ^ a b Kesling, Robert V. (1964). "Two New Crinoids of the Family Periechocrinitidae from the Middle Devonian Thunder Bay Limestone of Michigan". Contributions from the Museum of Paleontology, University of Michigan. XIX (11): 143–155.
- ^ a b c d e f g Stumm, Erwin (1953). "Trilobites of the Devonian Traverse Group of Michigan" (PDF). University of Michigan Press - Museum of Paleontology.