4.3" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Sauropod it also plays a role

it also plays a role in ceramic production and has been utilized as a minor iron ore in certain geological settings

and metaphysical practices

Long before fish dominated ancient seas

have yielded a coherent chronology

Yellow Calcite

4.3" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Sauropod it also plays a roleLocation: Francis Creek Shale Formation, Illinois Weight: 1 Pound 1. 5 Ounces Dimensions: 4. 9 Inches Long, 2. 7 Inches Wide, 1. 2 Inches Thick (Nodule) Leaf Dimensions: 4. 3 Inches Long, 1. 5 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Pecopteris 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