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Detroit River Group
Stratigraphic range: Devonian
Lucas Dolomite, upper Detroit River Group, Middle Devonian (quarry near Junction, Ohio)
Type	Group
Sub-units	Lucas Dolomite, Formosa Reef Limestone
Underlies	Dundee Limestone and Traverse Formation
Overlies	Holland Quarry Shale and Wabash Formation
Location
Region	Indiana, Michigan and Ohio
Country	United States

The Detroit River Group is a geologic group in Michigan and Ohio. It preserves fossils dating back to the Devonian period.

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.

Further reading

• Brian R. Pratt, Lower Devonian Stromatoporoid reefs. Formosa Reef Limestone (Detroit River Group) of Southwestern Ontario. In: Reefs, Canada and Adjacent Area, ed. by H.H.J. Geldsetzer, N.P. James and G.E. Tebbutt, Editors Canadian Society of Petroieum Geologists Memoir 13, 1989, p. 506-509
• Gilbert Klapper and, William A. Oliver, Jr., The Detroit River Group is Middle Devonian: Discussion on "Early Devonian age of the Detroit River Group, inferred from Arctic stromatoporoids". (Canadian Journal of Earth Sciences, 1995, 32(7): 1070–1073, https://doi.org/10.1139/e95-088

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