Earth Science Week, Fossil Day: Ruffin's Slab
North Carolina has good localities for Mesozoic fossils, but the most enigmatic and, to me, most interesting ones are from the Proterozoic (once called Precambrian). The Ediacaran Period is part of the latest Proterozoic, often called the Neoproterozoic. The Cambrian is still the Cambrian, and at the base of the Cambrian is what is often called the "Cambrian Explosion." At that point in the Earth's history, animals developed hard parts that could be easily fossilized.