Don’t expect the next “Jurassic Park” reboot to be set in Florida. Dinosaur fossils have never been found in the state, but according to the Florida Museum of Natural History, “Florida has the richest fossil record of vertebrate animals of the eastern United States.” Other prehistoric creatures roamed the land long before we did, and many of their fossils have been discovered in Polk County due to the area’s rich phosphate mining history. Meet these five interesting species that were exposed by mining in the “Bone Valley.” Enhydritherium terraenovae | These large otters could average up to 100 pounds, thanks to a mostly shellfish diet. Their fossils were discovered in 1985, but the species lived up to 6.5 million years ago. Carcharocles megalodon| The subject of many a B-movie, the megalodon shark species is thought to be the largest fish of all time, with a maximum weight of 143,000+ pounds and length of 58 ft…