Tullimonstrum gregarium, LARGE Tully Monster ec824443c95d0e87cc3e574f9cdc918c Colors will vary slightly as

Colors will vary slightly as well

needing no cutting or polishing

and it's believed he has one of the most important Mazon Creek fossil collections in the world

at up to 18 tons

As mentioned

Tullimonstrum gregarium, LARGE Tully Monster ec824443c95d0e87cc3e574f9cdc918c Colors will vary slightly asTullimonstrum gregarium, popularly known as The Tully Monster, is the Illinois State Fossil & is perhaps one of the most mysterious fossils ever unearthed Age of the Tully Monster During the Pennsylvanian Period (roughly 307 million years ago), the land that is now Illinois lay near Earth's equator. Dense swamps, forested with primitive plants, covered much of western and central Illinois. In shallow seas nearby, the Tully monster swam along with