5.2" Brontothere Fossil Knee Bone Eocene Age Badlands S Dakota Titanothere COA Redwood Hornblende (Pargasite): A common amphibole

Hornblende (Pargasite): A common amphibole mineral

Members of the class Rhynchonellata are recognized by their dorsal–ventral shell arrangement

The Frasch process

Weight: 6 Ounces

5.2" Brontothere Fossil Knee Bone Eocene Age Badlands S Dakota Titanothere COA Redwood Hornblende (Pargasite): A common amphiboleLocation: White River Badlands, South Dakota Weight: 1 Pound 8 Ounces Dimensions: 5. 2 Inches Long, 3. 2 Inches Wide, 2. 7 Inches Thick (Matrix) Eocene Age, 56 to 33. 9 million years Old. Comes with a Certificate of Authenticity. The item pictured is the one you will receive. Brontotheres were giant mammals that roamed the region now known as Badlands National Park roughly 56 to 33. 9 million years ago. Scientifically referred to as Megacerops