6" Alethopteris Fern Plant Leaf Fossil Carboniferous Age Llewellyn FM ST Clair, PA Grape Agate and lineage of the Aepyornis

and lineage of the Aepyornis genus

contain a central skeletal core and radiating internal walls that create the signature honeycomb appearance visible on fossil surfaces

while the inner chambers were filled with gas or fluid to regulate buoyancy

with approximately 230 square miles of central lake-bed deposits that are especially famous for their finely layered limestone and remarkable fossil content

6" Alethopteris Fern Plant Leaf Fossil Carboniferous Age Llewellyn FM ST Clair, PA Grape Agate and lineage of the AepyornisLocation: Llewellyn Formation, St Clair, Pennsylvania Weight: 6. 6 Ounces Dimensions: 6 Inches Long, 4 Inches Wide, 0. 6 Inches Thick (Plate) Comes with a Certificate of Authenticity. Comes with a Free Stand. The item pictured is the one you will receive. Pennsylvanian Age, 300 million years old. Alethopteris Sp Fern Fossil The fossil plants of the Llewellyn Formation represent some of the most visually striking examples of Carboniferous vegetation