4.1" Neuropteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Grposaurus “Stone of Heaven

“Stone of Heaven

Mature specimens typically measured up to nine meters in length

helping paleontologists understand how Tyrannosaurus rex developed from juvenile to apex predator

alongside botanical remains

4.1" Neuropteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Grposaurus “Stone of HeavenLocation: Francis Creek Shale Formation, Illinois Weight: 1 Pound 13. 3 Ounces Dimensions: 4. 8 Inches Long, 3. 8 Inches Wide, 2 Inches Thick (Nodule) Leaf Dimensions: 4. 1 Inches Long, 1. 6 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Neuropteris 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