Phosphate Mining Company (Miocene of the United States)

Where: Polk County, Florida (27.9° N, 82.0° W: paleocoordinates 28.1° N, 80.1° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Bone Valley Member (Peace River Formation), Tortonian (11.6 - 7.2 Ma)

• Bradley Fauna; lower beds

•Previously Barstovian, but Missimer (1999) suggested that the Peace River Formation in Florida was likely deposited between 11-4.3Ma. The lower sequence is Tortonian, deposited between 11-8.5Ma, and the upper sequence is Zanclean and deposited between 5.2-4.3Ma

• member-level stratigraphic resolution

Environment/lithology: lagoonal; lithified, pebbly, phosphatic, argillaceous, sandy sandstone

• Bone Valley Formation environment consists of both shallow lagoons and bays along the coast.
• Clastic rock unit consisting primarily of pebble- to sand-sized phosphates in a matrix of clay and quartz sand.

Size class: macrofossils

Preservation: original phosphate

Reposited in the FLMNH

Collection methods: salvage,

Primary reference: G. S. Morgan. 1994. Miocene and Pliocene marine mammal faunas from the Bone Valley Formation of central Florida. Contributions in Marine Mammal Paleontology Honoring Frank C. Whitmore Jr., Proceedings of the San Diego Society of Natural History 29:239-268 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 45453: authorized by Mark Uhen, entered by Nick Pyenson on 24.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cetacea - Platanistidae
Pomatodelphis inaequalis Allen 1921 toothed whale