4.6" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Frill The central lakebed contains exceptionally

The central lakebed contains exceptionally fossil-rich laminated limestone

often compared to a ram’s horn

This hollow structure confirms its classification as a lambeosaurine hadrosaurid

technically a botryoidal purple chalcedony from the Mamuju region of Sulawesi

giving it versatility in movement and feeding

4.6" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Frill The central lakebed contains exceptionallyLocation: Francis Creek Shale Formation, Illinois Weight: 1 Pound 3. 9 Ounces Dimensions: 5. 9 Inches Long, 3. 5 Inches Wide, 0. 9 Inches Thick (Nodule) Leaf Dimensions: 4. 6 Inches Long, 3. 7 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Pecopteris Fossil Leaves The Mazon Creek fossils date back to the Pennsylvanian sub period (roughly 307 million years ago). During this time, the area was a