3.9" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Scute 5 Inches Wide (Branch)

5 Inches Wide (Branch)

this specimen has remained untouched

This hydrogen sulfide then combines with oxygen-rich groundwater to produce elemental sulfur

these polished slabs showcase the elegant geometry and lustrous finish that make them prized by collectors and enthusiasts of paleontological specimens

Although single-shell dates can be unreliable due to the mobility of uranium isotopes

3.9" Annularia Fossil Leaves Mazon Creek Nodule Pennsylvanian Age Split-Pair Scute 5 Inches Wide (Branch)Location: 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