Lucas Formation

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.

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

Fossil content

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