The Boone Formation a discrete and definable unit of cherty limestone rock strata located in northwest Arkansas, Missouri and northeast Oklahoma.

[4] The Boone Formation is rich in fossils, and occasionally preserves the remains of sharks' teeth in outcrops along Buffalo National River.

[5]: 64 Equivalent rocks of the Osagean in southwest Missouri include the Pierson Limestone, Fern Glen Formation, Reeds Spring Formation, Elsey Formation (including the Grand Falls Chert), Burlington Limestone and the Keokuk Limestone.

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