Tamiami Formation

The Tamiami Formation is a Late Miocene to Pliocene geologic formation in the southwest Florida peninsula.

Age
Period: Neogene Epoch: Late Miocene to Pliocene Faunal stage: Clarendonian through Blancan ~13.06–2.588 mya, calculates to a period of

Location
The Tamiami Formation appears in the counties of Charlotte, Lee, Hendry, Collier and Monroe. It is widespread in Florida and part of the intermediate confining aquifer system. The Tamiami formation overlies the Hawthorn at every locality where the Hawthorn has been penetrated and is overlain unconformably by the Caloosahatchee marl of the Pliocene in Charlotte County.

Composition
The Tamiami Formation contains a wide range of mixed carbonate-siliciclastic lithologies and associated faunas. It occurs at or near the land surface in the southern peninsula with numerous named and unnamed members recognized within the Tamiami Formation. Its unevenness indicates that the upper part has been subjected to erosion.

Lithologies
The Tamiami Formation includes: Phosphate is present in limited quantities throughout the Tamiami in sand and gravel.
 * light gray to tan, unconsolidated, fine to coarse grained sand with fossils
 * light gray to green, poorly consolidated, fossil bearing sandy clay to clayey sand
 * light gray, poorly consolidated, very fine to medium grained, calcareous, fossil bearing sand
 * white to light gray, poorly consolidated, sandy, fossil bearing limestone
 * white to light gray, moderately to well hardened, sandy, fossiliferous limestone

Sub-units

 * Bonita Springs Marl Member
 * Golden Gate Reef Member
 * Ochopee Limestone Member
 * Pinecrest Sand Member

Fossils
Fossils appear in casts and molds, as well as original material.
 * Barnacles
 * Mollusks (Ostrea disparilis, Chione ulocyma, and Turritella pontoni)
 * Corals
 * Echinoids
 * Foraminifers
 * Nanoplankton (calcareous)