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offering collectors direct paleontological evidence of this remarkable transitional whale
Late Triassic
and jewelry applications
and plant diversity in North America
Nanotyrannus remains an important subject in the study of tyrannosaurid growth
2.4" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Mercenaria offering collectors direct paleontological evidenceLocation: Francis Creek Shale Formation, Illinois Weight: 6 Ounces Dimensions: 2. 9 Inches Long, 2. 3 Inches Wide, 0. 9 Inches Thick (Nodule) Leaf Dimensions: 2. 4 Inches Long, 2. 3 Inches Wide The item pictured is the one you will receive. Pensylvanian Age, 370 million years ago Annularia 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