The Florida Hard Rock district mines phosphate from a belt up to 30 miles wide and 150 miles long, extending from Tallahassee on the west to Pasco County on the east.
The Florida Hard Rock district mines phosphate from the Alachua formation of Pliocene age. The Alachua formation outcrops in northern Florida, along a belt up to 30 miles wide and 150 miles long, extending from Tallahassee on the west to Pasco County on the east.