Georgia s highest mountain is 4,784-foot Brasstown Bald, which rises near the northern border near Rabun Gap. The Appalachian Trail begins or ends at Springer Mountain, linking Georgia with Maine far to the north. A shark s skeleton is made of cartilage. This material is softer than bone and is seldom fossilized. So their hard, enamel-covered teeth are generally the only evidence we have of prehistoric sharks.
Sharks never stop growing new teeth.
Shark teeth are not set firmly in the jaws, but in the gums, where they occur in layered rows. If a tooth is lost, another one moves forward to take its place. Perhaps this was true of some prehistoric sharks as well. The oldest shark teeth in Georgia date back more than sixty-five million years to the Cretaceous Period of the Mesozoic Era, when dinosaurs ruled the land. The youngest shark teeth come from the Cenozoic Era, and the youngest of these represent the Pleistocene, or Ice Age, which ended more than 10,000 years ago.