An official website of the United States government
Here's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Florida's Bone Valley is the source for about 60 percent of the phosphate mined in the U.S. for the production of chemical fertilizer. LCMAP data offers insight on the frequent land cover changes that accompany the mining process.