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from about 201 million years ago to their extinction around 66 million years ago at the end of the Cretaceous period
Postosuchus played a key role in maintaining the balance of its prehistoric ecosystems
equipped with specialized teeth
5 Inches Wide (Branch)
The impact of such a large meteorite would have released an enormous amount of energy
4.3" Pecopteris Fontainei Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Sericho from about 201 million yearsLocation: 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