3.6" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Cave bear which are the skeletal remains

which are the skeletal remains of individual coral polyps

Some believe it housed salt glands

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

these horns grew from small bumps into enormous structures

This combination of strength

3.6" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Cave bear which are the skeletal remainsLocation: 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