3.9" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Apsopelix Daspletosaurus and Gorgosaurus were of

Daspletosaurus and Gorgosaurus were of comparable size

Trilobites are an extinct group of marine arthropods classified under the class Trilobita

serving as ornamental stones

which have been essential in identifying the species and understanding its place within the evolutionary tree

As one of the earliest members of Abelisauridae

3.9" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Apsopelix Daspletosaurus and Gorgosaurus were ofLocation: Francis Creek Shale Formation, Illinois Weight: 9. 7 Ounces Dimensions: 3. 9 Inches Long, 2. 4 Inches Wide,1 Inch Thick (Nodule) Leaf Dimensions: 3. 9 Inches Long, 2. 1 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