Molar and jaw section from a Stegodon Trigonocephalus USA The fully intact metacarpal (front

The fully intact metacarpal (front ‘foot bone’) of the now extinct Steppe Bison

With field plaster to the back of the piece

crystals form on the geode's ‘gas cavity’ walls

Dating from the upper Cretaceous

Molar and jaw section from a Stegodon Trigonocephalus USA The fully intact metacarpal (frontMolar and jaw section from a Stegodon Trigonocephalus. Dating from the Pleistocene, Stegodon were some of the largest trunked animals of the Proboscidea order. First appearing in the fossil record around11 million years ago, the Stegodon is thought to have become extinct in the late Pleistocene. Although the Stegodon is considered to be a sister group of the mammoth as well as the elephant, their teeth are quite distinctively different, with molars