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as they closely resembled modern crocodiles in body shape
Adult males reached shoulder heights between 2
providing unique insights into prehistoric ecosystems
consists of massive beds of relatively pure chalk
A keeled breastbone anchored powerful flight muscles
4.1" Lobatopteris Fossils Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Troodon as they closely resembled modernLocation: Francis Creek Shale Formation, Illinois Weight: 12 Ounces Dimensions: 4. 1 Inches Long, 3. 4 Inches Wide, 0. 9 Inches Thick (Nodule) Leaf Dimensions: 4. 1 Inches Long, 3. 4 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Lobatopteris 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
