This image is of a Brontops robustus rhino-like skull fossil on display at Mace Brown Museum of Natural History (August 2017). Its name means thunder face (bront ops). It dates to the Early Oligocene Epoch (about 34-32 million years ago) of the Paleogene Period. The fossil was found in Custer County South Dakota USA.
The Mace Brown Museum of Natural History is located at the College of Charleston, 202 Calhoun Street, 2nd Floor, Charleston, South Carolina 29424.
Learn more at their blog: http://blogs.cofc.edu/macebrownmuseum/