| image = [[File:
Erie Proving Ground.jpg]]
| caption = This is a partial skull of an Ice Age giant beaver with incisors (front teeth) almost completely intact. The specimen was found in Wilmington, Clinton County. It has been dated 1,800,000 to 11,000 years before the present.
The giant beaver, ''Castoroides ohioensis'', is comparatively well known from Ohio[[Category:Natural History Geology ]] [[Category:Fossils]]