DUETTE — At its Wingate Creek and Four Corners mines in Manatee County, Mosaic is digging phosphate rock out of the earth for use as the primary component in the agricultural fertilizers it manufactures.
Rich in an essential plant nutrient, phosphorous, the rock lies beneath the surface in deposits throughout central Florida. Left behind when sea water receded from Florida about 15 million years ago, much of the phosphate collected is in a formation known as the Bone Valley. The 1.3-million acre formation stretches between modern-day Polk, Hillsborough, Desoto and Manatee counties.
Florida is now home to 27 phosphate mines covering more than 491,900 acres, according to the Florida Department of Environmental Protection.