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Hookers Prairie Mine, Central Florida Phosphate District (Bone Valley), Polk Co., Florida, USA

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Latitude & Longitude (WGS84): 27° 46' 52'' North , 81° 57' 0'' West
Latitude & Longitude (decimal): 27.7811111111, -81.95


REF:Deposit:: FLORIDA DEPARTMENT OF TRANSPORTATION, GENERAL HIGHWAY MAP, POLK COUNTY, FLA., 1971
Deposit:: W.R. GRACE & COMPANY, ANNUAL REPORT, 1977
Deposit:: R.W. HOPPE, PHOSPHATES ARE VITAL TO AGRICULTURE AND FLORIDA MINES FOR ONE-THIRD THE WORLD, IN E/M
Commodities (Major) - Phosphorus-Phosphates
Development Status: Producer
Deposit Model: 244: Phosphate, warm current type
Host Rock Unit: Bone Valley, Hawthorn: Underlies Bone Valley Unconformably Yellow-Tan Dolostone
Structure: Sand, Clay, Dolomite
Host Rock: Phosphorite

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Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Pliocene - Middle Miocene
2.588 - 15.97 Ma
Hawthorn Group, Peace River Formation, Bone Valley Member

Age: Neogene (2.588 - 15.97 Ma)

Stratigraphic Name: Bone Valley Member

Description: The Bone Valley Member (originally the Bone Valley Formation of Matson and Clapp, 1909), Peace River Formation occurs in a limited area on the southern part of the Ocala Platform in Hillsborough, Polk and Hardee Counties. Throughout its extent, the Bone Valley Member is a clastic unit consisting of sand-sized and larger phosphate grains in a matrix of quartz sand, silt and clay. The lithology is highly variable, ranging from sandy, silty, phosphatic clays and relatively pure clays to clayey, phosphatic sands to sandy, clayey phosphorites (Webb and Crissinger, 1983). In general, consolidation is poor and colors range from white, light brown and yellowish gray to olive gray and blue green. Mollusks are found as reworked, often phosphatized casts. Vertebrate fossils occur in many of the beds within the Bone Valley Member. Shark's teeth are often abundant. Silicified corals and wood are occasionally present as well. The Bone Valley Member is an extremely important, unique phosphate deposit and has provided much of the phosphate production in the United States during the twentieth century. Mining of phosphate in the outcrop area began in 1888 (Cathcart, 1985) and continues to the present.

Lithology: Major:{sand,clay,phosphorite}, Minor:{silt}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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