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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.
Fossil content
Vertebrates
Conodonts
Conodonts reported from the Thunder Bay Limestone
|
Genus |
Species |
Presence
|
Material |
Notes |
Images
|
Icriodus
|
I. cymbiformis
|
|
[2]
|
Also found in the
Detroit River,
Traverse,
Antrim,
Ferron Point,
Genshaw,
Alpena and
Norway Point formations.
|
|
I. expansus
|
|
[2]
|
Also found in the
Detroit River,
Traverse,
Antrim,
Lucas,
Anderdon,
Dundee,
Bell,
Ferron Point,
Genshaw,
Alpena,
Potter Farm and
Norway Point formations.
|
|
I. latericrescens latericrescens
|
|
[2]
|
Also found in the
Traverse,
Bell,
Ferron Point,
Genshaw,
Newton Creek,
Alpena,
Four Mile Dam,,
Norway Point and
Potter Farm formations.
|
|
Polygnathus
|
P. varcus
|
|
[2]
|
Also found in the
Traverse,
Antrim,
Alpena,
Four Mile Dam and
Norway Point formations.
|
|
Placoderms
Placoderms reported from the Thunder Bay Limestone
|
Genus |
Species |
Presence
|
Material |
Notes |
Images
|
Ptyctodus
|
P. sp.
|
"Northeast shore of Partridge Point, 6.4 kilometers south of
Alpena".
[1]
|
A tooth plate (UMMP 3023).
[1]
|
A
ptyctodontid.
|
|
Invertebrates
Brachiopods
Cnidarians
Echinoderms
Trilobites
See also
References
- ^
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.