Photo: The remains of Teleoceras (extinct hippo-like relatives of rhinos) are so numerous and concentrated that the main section of Ashfall is called the &quot;Rhino Barn&quot;. Other fossils at the &quot;Rhino Barn&quot; include the remains of horses and camels. The &quot;barn&quot; was built to protect the fragile fossils from the weather so they could remain in the locations in which they were found.