Edmontosaurus Ischium Bone in Sandstone Matrix- Wyoming

This 9.5-inch sandstone specimen contains an authentic dinosaur ischium bone in matrix from the Lance Formation of Wyoming. The ischium, part of the dinosaur’s pelvis, formed the rear portion of the hip and supported powerful leg muscles used for walking. The specimen has been stabilized but remains stable and well-preserved. It offers a rare glimpse into the Late Cretaceous environment, frozen in stone for over 66 million years.

The Lance Formation in Wyoming, a geological formation from the Late Cretaceous period, is known for its rich fossil content, including the remains of hadrosaurs, a group of duck-billed dinosaurs. Among the most intriguing discoveries from this region are the fossilized tendons of these hadrosaurs, which offer unique insights into the anatomy and physiology of these prehistoric creatures.

Characteristics of Fossilized Tendons: Fossilized tendons in hadrosaurs are primarily ossified tendons, which means they have undergone a process of mineralization, turning them into stone. These tendons are typically found along the spine and tail of the dinosaur. In life, these tendons would have provided support and stability to the animal's body, especially important for large, bipedal or quadrupedal creatures like hadrosaurs.