The Lucas Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.

Lucas Formation
Stratigraphic range: Middle Devonian
Lucas Dolomite (Middle Devonian; quarry near Junction, Ohio)
TypeFormation
Unit ofDetroit River Group
UnderliesAnderdon Limestone and Dundee Formation
OverliesAmherstburg Formation
Location
RegionMichigan and Ohio
CountryUnited States

Fossil content

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

References

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