Over 300 million years old, these fern plates come from the Llewellyn Formation of central Pennsylvania.
All slabs are unique, and your purchase will include a card with the species on the piece. The most common genera are Neuropteris, Pecopteris, and Alethopteris, though the genera Sphenophyllum, Mariopteris, and more are also represented. Medium slabs are at minimum 8″ long up to 14″ long. If you want specific dimensions, reach out to our team!