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Annual net imports (positive) and net exports (negative) into the United States of phosphate rock, 1900-2015 (data from US Geological Survey) The US was a long-time exporter of phosphate rock, and from the 1960s into the 1990s a major exporter. The US became a net importer of phosphate rock for the first time in 1996.
These contain the waste byproducts of the phosphate fertilizer industry. Phosphate is a declining export to China. Previously, significant amounts of rock were shipped to China, where it was processed into phosphate fertilizer. The majority of phosphate mining in Florida is done in the Peace River watershed. Phosphate mining companies use ...
The Bone Valley Formation is a geologic formation in Florida. It is sometimes classified as the upper member of the Peace River Formation of the Hawthorn Group . [ 2 ] It contains economically important phosphorite deposits that are mined in west-central Florida, as well as rich assemblages of vertebrate fossils .
Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock that contains high amounts of phosphate minerals. The phosphate content of phosphorite (or grade of phosphate rock) varies greatly, from 4% [1] to 20% phosphorus pentoxide (P 2 O 5). Marketed phosphate rock is enriched ("beneficiated") to at least 28%, often more ...
They are clay-like with some dolomite with a very fine to medium grained phosphate component. 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. The phosphate content is high enough to warrant mining ...
No land animals were present in Florida prior to the Miocene. The largest deposits of rock phosphate in the United States are found in Florida. [1] Most of this is in Bone Valley in central and west-central Florida. [2] Extended systems of underwater caves, sinkholes and springs are found throughout the state and supply most of the water used ...
The company was originally organized as the Coronet Phosphate Company in 1906. The processing plant near Plant City was constructed and began mining operations in 1908. The phosphate was mined from the surrounding land holdings by a combination of dragline removal of the soil above the phosphate deposits (overburden) and hydraulic pressure ...
Location of the Hawthorn Group within Florida (in red). The Hawthorn Group (also Hawthorne Group, previously called Hawthorn(e) Formation) [a] is a stratigraphic unit of Miocene age in South Carolina, Georgia, and Florida, in the United States. It is known for its phosphate rock resources, and for its rich assemblages of Neogene vertebrate fossils.