Four Rivers property overlays Suwannee and Ocala Limestone formations. The Suwannee formation is generally referred to as hard rock. Existing mining leases in western Taylor County have been extracting this limestone for decades and sell to local and regional markets. In addition to selling rock products, the mines also sell dolomitic additives for fertilizer. One consultant estimated the amount of lime rock resources located under Four Rivers’ property is in excess of 38 billion tons. A Strategic Aggregates Study prepared for the Florida DOT in 2007 referred to this area as possibly becoming Lake Belt North in recognition of the significant quantity of hard rock.