4.2" Macroneuropteris Fossils Leaf Mazon Creek Nodule Pennsylvanian Age Split-Pair Spinosaurus with its extinction likely driven

with its extinction likely driven by a combination of climate change and hunting pressures from early humans

massive skull

Lambeosaurus was a bipedal herbivore

perfectly adapted for preying on small surface-dwelling fish like Knightia

Crystallizing in the cubic system

4.2" Macroneuropteris Fossils Leaf Mazon Creek Nodule Pennsylvanian Age Split-Pair Spinosaurus with its extinction likely drivenLocation: Francis Creek Shale Formation, Illinois Weight: 11. 9 Ounces Dimensions: 4. 7 Inches Long, 2. 6 Inches Wide, 1 Inch Thick (Nodule) Leaf Dimensions: 4. 2 Inches Long, 1. 3 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Macroneuropteris Fossil Leaf 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