3.6" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Cave bear these horns grew from small

these horns grew from small bumps into enormous structures

This is comparable to how ceratopsian dinosaurs used differences in horns and frills to distinguish between genera

Its fossils help paleontologists understand the varied survival strategies that characterized Late Cretaceous marine life shortly before the mass extinction event reshaped Earth’s ecosystems

This combination of strength

3.6" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Cave bear these horns grew from smallLocation: Francis Creek Shale Formation, Illinois Weight: 11. 2 Ounces Dimensions: 3. 7 Inches Long, 2. 7 Inches Wide, 1. 2 Inches Thick (Nodule) Leaf Dimensions: 3. 6 Inches Long, 2. 3 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Pecopteris Fontainei 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