Plant fossils for sale St. Clair, Pennsylvania(United States) fern leaf plant fossil slabs for sale. Educational, affordable, cheap, and authentic, these natural Carboniferous fern plants died over 300 million years ago. A much needed addition to any rockhound's rock, fossil, or mineral collection. St. Clair plant fossils are also a valuable resource for studying, collecting, or as a geology, paleobotany, palaeobotany, paleontology teacher's aid. http://www.fernfossils.com
