This has modern economic impact because of forming reservoirs for hydrocarbons as well as some mineral deposits.

Fossils of Conodonts Paraprioniodus costatus and Leptochirognathus quadratus indicate Whiterockian age.

The Everton Formation is composed primarily of dolomite, limestone, and some sandstone as well as a zone of breccia.

The grains are nearly identical to the overlying St. Peter Sandstone, and may cause some confusion in identifying the different formations.

Fossils of ostracods, cephalopods, gastropods, bivalves, trilobites, and bryozoans are preserved within the formation.

[5] Five named members of the Everton Formation are recognized (in stratigraphic order): The Beekmantown Group is the upper unit of the Knox Supergroup.

[6] It is a late Cambrian to lower–middle Ordovician geologic group that occurs in the eastern Canada (Québec) and northeastern United States,[7] datable from its conodont fauna.

[10] Within the breccia zone galena is extracted along with small amounts of sphalerite and pyrite.

[16] The Sugar Loaf landmark located in Winona, Minnesota is made of Oneota Dolomite.

The unconformity left river valleys that were filled with siliciclastic material that was covered by marine deposits.