These are broken halves of a hip socket of a shovel-tusked elephant. Currently we do not have enough material to positively identify which genus of Gomphothere we have at the site.

These elephants are quite common in Miocene- and Pliocene-aged deposits. The large, flat lower tusks of these animals are unique (like a giant scoop shovel), and were likely used (at least in some species) to strip the bark off of trees and other vegetation.