Tullimonstrum gregarium, Tully Monster (with Tail) 396922f96d9c151be8082bc5d7a56896 A baroque pearl

A baroque pearl

Most copper nuggets found in Arizona are relatively small

which means heavy

Specimens from this area are prized by collectors for their excellent preservation and fine detail

Devonian period: 395 m

Tullimonstrum gregarium, Tully Monster (with Tail) 396922f96d9c151be8082bc5d7a56896 A baroque pearlTullimonstrum 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