3.5" Lobatopteris Fossils Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Scabriscutellum known as the Cretaceous–Paleogene boundary

known as the Cretaceous–Paleogene boundary

Step into the world of early Paleocene flora with this remarkable Zizyphoides Flabellum fossil leaf

and the United States

Geologically

3.5" Lobatopteris Fossils Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Scabriscutellum known as the Cretaceous–Paleogene boundaryLocation: Francis Creek Shale Formation, Illinois Weight: 8. 9 Ounces Dimensions: 3. 8 Inches Long, 2. 8 Inches Wide, 0. 9 Inches Thick (Nodule) Leaf Dimensions: 3. 5 Inches Long, 3 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Lobatopteris 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 tropical delta