3.2" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Cave bear allowing organisms to be preserved

allowing organisms to be preserved intact while millimeter-thick layers of limestone slowly accumulated

The vibrant subtropical landscape surrounding the lake bursts to life through rare fossils: a horse

While howardites represent composite material from both eucrite and diogenite sources

enabling it to efficiently chew and process tough plant material

3.2" Pecopteris Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Cave bear allowing organisms to be preservedLocation: Francis Creek Shale Formation, Illinois Weight: 9. 5 Ounces Dimensions: 3. 8 Inches Long, 3. 1 Inches Wide, 0. 7 Inches Thick (Nodule) Leaf Dimensions: 3. 2 Inches Long, 3 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 tropical delta