Horse Jaw Section | South Dakota chalcedony and skeletal structure

and skeletal structure

hand selected polished orthoceras (Cephalopod) fossil specimen measuring approx

The mine comprises three open-cut pits including "Big Pit"

Comes with a 1" acrylic stand

Horse Jaw Section | South Dakota chalcedony and skeletal structureMesohippus sp. Oligocene (33 30 MYO) Brule Formation White River Badlands South Dakota Specimen approx. size: 1. 25" x 1" x 0. 5" Mesohippus is a genus of extinct early horse that lived during the late Eocene to early Oligocene epochs, approximately 37 to 30 million years ago. Its fossils are primarily found in North America, particularly in the White River Formation of the western United States. As a transitional form in equid evolution, Mesohippus