4.3" Pecopteris Fontainei Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Mammoth This behavior makes Ursus spelaeus

This behavior makes Ursus spelaeus unique among bears and highlights its adaptation to Ice Age ecosystems

Halisaurus followed a different evolutionary path

and possibly other ammonites

it often appears in nodular or botryoidal forms

brontotheres gradually evolved and diversified

4.3" Pecopteris Fontainei Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Mammoth This behavior makes Ursus spelaeusLocation: Francis Creek Shale Formation, Illinois Weight: 14. 3 Ounces Dimensions: 4. 3 Inches Long, 3. 7 Inches Wide, 0. 8 Inches Thick (Nodule) Leaf Dimensions: 4. 3 Inches Long, 3. 7 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Pecopteris Fontainei 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