Lucas Formation

Lucas Formation
Lucas Formation
Stratigraphic range: Middle Devonian
	Lucas Dolomite (Middle Devonian; quarry near Junction, Ohio)
Type	Formation
Unit of	Detroit River Group
Underlies	Anderdon Limestone and Dundee Formation
Overlies	Amherstburg Formation
Location
Region	Michigan and Ohio
Country	United States

Last updated July 01, 2025

The Lucas Formation is a geologic formation in U.S. states of Michigan and Ohio. It preserves fossils dating back to the middle Devonian period.

Fossil content

Cnidarians
Genus	Species	Presence	Material	Notes	Images
Siphonophrentis	S. gigantea		^[1]	A coral

References

↑ McCall, Christian R (16 October 2018). "Exceptional new fossil of Siphonophrentis gigantea" . Retrieved 25 July 2022.

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

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[1] McCall, Christian R (16 October 2018). "Exceptional new fossil of Siphonophrentis gigantea" . Retrieved 25 July 2022.

[1]