Thought I'd share a few photos of a tortoise prep I just completed.  This is from the white river group of Chadron, NE (circa 33 mya).   Here is a series of photos from discovery to excavation to restoration and preparation.   The discovery:  broken shell (As usual, I forgot to take a true "before photo".  I've already probed a bit here).       After some digging, it was discovered that this individual is upside-down.  Here, the plastron is being revealed.