Unprepped Oligocene Mammal Fossils in Rock - South Dakota

This is a 3.5" wide cluster of Oligocene age mammal bones in rock. It was collected from the the Brule Formation in South Dakota and the fossils would be approximately 30-34 million years old. The exposed bones include a partial jaw, skull pieces, a partial limb bone, and a small but complete phalange bone.

This specimen could make for a cool display piece, or even be a nice fossil prep project. There's no telling what other bones could be hiding within this rock!