Period: Neogene Epoch: Miocene to Pliocene Faunal stage: Arikareean through Hemphillian, ~23.03–4.9 mya, calculates to a period of ~18.13 million years The Peace River Formation appears as an outcropping or is beneath a thin overburden from Hillsborough County to Charlotte County on the southern part of the Ocala Platform.

It is widespread in Florida and part of the intermediate confining aquifer system.

Carbonates are usually light gray to yellowish dolomite found in outcroppings.

The dolomites are soft to hard with variably sandy, clay-like, phosphate components with opaline chert often found.

[3] The Bone Valley Member (originally the Bone Valley Formation) is a subunit of the Peace River Formation and occurs in a limited area on the southern part of the Ocala Platform in Hillsborough, Polk County, and Hardee County.