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Mosasaur Jaw Prepping Adventure!


LordTrilobite

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About a month ago I saw this really nice mosasaur dentary fragment up for sale. So of course I bought it immediately as I couldn't pass up such a nice piece.

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So I proceded to prep it as there was a lot of matrix everywhere. It soon became clear that there was more than just the one intact tooth and one broken tooth base. Two roots with some tooth remnants had partially slid out from the jaw prior to fossilisation and were initially hidden from view.

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Since the jaw was sticking out a lot on the bottom I made the choice to completely remove the jaw from the matrix. the other side turn out really nice. Though as I found out, not only had the roots slid out, part of the front of the jaw was a bit of a jumbled mess. In the matrix what I found what I initially thought was a vertebra turned out to be a really weird shaped bone. I'm still not sure what to make of this little bone.

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With the front of the jaw in pieces, I chose to remove every piece so I could piece the jaw back together the way it should be. Especially the roots that were still partially inside the jaw were tricked to get out. But In the end I was able to get all five pieces removed without doing any damage. Two roots, two pieces of jaw on the outside and one piece between the roots. I then proceded to put everything back in place. Thankfully there were enough places that still had a close fit so I could accurately put them in the right position. Though overtime this jaw has overgone some distortion so it's not a 100%. But I managed to get it pretty close to what it should be.

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I thought it turned out quite nice.

With prepping done, I made some nice pictures and posted it in the gallery thinking I was done with this piece...

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Olof Moleman AKA Lord Trilobite

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But that's not the end of the story!

About a week ago, again, I was browsing on the internet for some nice sales. And I found another nice piece of unprepped mosasaur jaw. Upon looking more closely I thought it looked almost too similar to my first jaw piece. Same seller, same bone and matrix colour, roughly the same size. So obviously I thought that no way is my luck this good.

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So I downloaded the pictures. I overlayed the photos I took of my already prepped jaw. Low and behold, it seemed to fit together. Wasting no time, I bought this piece as well.

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When it arrived, I was over the moon. It fit like a glove. These two pieces were definitely from the same animal!

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So then I started to prep this piece. On this part there was some destortion and breakage. I removed the part that was at an angle like I did with the roots in front on the previous piece so that I could set it back in place.

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And so, the result is a really nice partial right dentary of a mosasaur. I couldn't be happier with the result. Now to make a nice stand for it...

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Edited by LordTrilobite
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Olof Moleman AKA Lord Trilobite

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A remarkable piece, and a terrific job bringing it to light!

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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Well done - and well spotted! :blink::faint::envy:

Terrific story and fossil!

Thanks for posting it!

Regards,

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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Nice prep and reconstruction---Tom

Grow Old Kicking And Screaming !!
"Don't Tread On Me"

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Excellent result and an interesting account.

Human beings, who are almost unique in having the ability to learn from the experience of others, also are remarkable for their apparent disinclination to do so. - Douglas Adams, Last Chance to See

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Well seen!! I've managed going back to a site and finding the rest of a fossil a couple of weeks later, but doing that on eBay is a real novelty!! Great prep too! And a wonderful addition to your collection!

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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Thanks for the positive comments everyone. :D

It actually wasn't Ebay, but a dutch auction site. But still, I was quite lucky indeed.

Olof Moleman AKA Lord Trilobite

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That is a wonderful piece and story! Great job prepping it.

~Charlie~

"There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK
->Get your Mosasaur print
->How to spot a fake Trilobite
->How to identify a CONCRETION from a DINOSAUR EGG

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  • 9 months later...

A small update on this piece. It's been a while since I prepped it. Now I've also scanned it. Which was quite difficult because of all the little details.

Besides scanning the actual fossil. I've also done some more digital prepping and reconstructing. One scan is the original fossil as it is, while the other has some reconstructed parts. I've straigthened the one complete tooth. Then I reconstructed the missing teeth based on that one tooth and the unerupted teeth elsewhere in the jaw. With one side repaired, I mirrored it to create the left side as well. Roughly one third of the dentary is still missing, which I did not try to reconstruct.

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Olof Moleman AKA Lord Trilobite

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The reconstruction is only digital. The first one is what the fossil actually looks like right now.

Olof Moleman AKA Lord Trilobite

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