3.5" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Ammonites This mid-sized crocodilian achieved notable

This mid-sized crocodilian achieved notable proportions

These remarkable creatures inhabited the ancient seas of the Paleozoic Era

and weathered volcanic ash layers

The Three Primary Body Sections (Tagmata):

Horns tend to be larger in males and smaller in females

3.5" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Ammonites This mid-sized crocodilian achieved notableLocation: Francis Creek Shale Formation, Illinois Weight: 1 Pound 13. 7 Ounces Dimensions: 5. 4 Inches Long, 3. 7 Inches Wide,1. 4 Inches Thick (Nodule) Leaf Dimensions: 3. 5 Inches Long, 2. 1 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Annularia 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