To do this repair, I dug down deep through the crack (which was 2 - 4 mm wide) with a narrow bit from the #5 Paleotool (c) until the nose broke off the rest of the skull. I then cleaned up all the excess matrix from the surfaces of the break and fit it back together. This resulted in a very clean fit of the parts in the original configuration. In addition, it gives us a chance to see the cross-section of the jaw bone structure. This is really cool since we won't be able to cut across the bone and section it after it is officially classified as a new animal (known as the Holotype).
So here are pictures: The skull before repair, with a tennis ball standing in for the eyeball
Here is the skull with the pieces all cleaned up and fit back together. The fit of the parts is very clean. They are not glued back together yet as it's easier to do the final preparation on smaller pieces. So I'm just holding them together by hand in this picture. The curve of the jaw is a little more pronounced after it's in the original location.
A closeup of the break, partially excavated with the Paleotool
Here's the inside of the nose after final cleaning. Note that there is a small tapered groove running from the tip of the nose back to the nasal passages and the naris (nostril holes) at the rear of this fragment. I believe this passage is used for expulsion of salt-laden water produced by specialized glands. These glands are found in marine iguanas and sea birds, and this physiological adaption allows them to live full time in the ocean and drink salt water. I bet this has never been seen before in such an old animal!
Sincerely, Greg Carr