Large 4" Edmontosaurus Phalanx (Toe Bone)

This is a large Phalanx (toe) bone from the hadrosaur Edmontosaurus annectens. It's about 4 inches tall and weights over a pound. It is from the Upper Cretaceous, Hell Creek Formation.

The bone comes from a well known private quarry in Butte County, Montana which was discovered back in the 1980's It represents a river channel deposit and consists of 2 meets worth of sandstone and gravel. Teeth and other bone material being swept down the river 66 million years ago would have been deposited here. the Hell Creek Formation represents a sub-tropical floodplain which would have been similar to coastal, modern-day Louisiana.