unknown tooth

[Carl]

Wow... Big blank for me, too. All of the previous suggestions have merit.

[Boesse]

I posted this to twitter, and there were some other paleontologists who thought rudist was the most likely option, and who made the best arguments in my opinion.

[JohnJ]

@jnoun11

 

Is this calcite based preservation or something else?  It looks brittle.  If it was a rudist, I would expect calcitic preservation.

[DPS Ammonite]

On 7/14/2020 at 3:43 PM, jnoun11 said:

 

 

There is an interesting tubular structure in the bottom photo. It may give a clue as to the age and ID of the bigger fossil. It sort of looks like a hollow bone. Any ideas?
 

I agree with others, if this is calcite and Cretaceous, a rudist is a good choice.

 

 

[jnoun11]

hi

the little bones are pieces of fishes bones. its not a rudist , even the shape. its bones not calcitic .

exist clearly two parts , one ,the base or root is bones and the second part the  tip is dense and used one face.

i keep seeking on a phosphate mine for more clues.

[Boesse]

If I may be a by asking this question: how do you know it's not calcite?

[jnoun11]

hi boesse

because i work from more than 30 years everydays with bones material. and lot of time hen you find a rudist , its colony or reef ith lot of them and the phosphate formation didnt have invertebrate in calcite.

 

today i 3D scan the teeth :

you can download it here:

https://www.dropbox.com/sh/xn4kwz8b5lud8b0/AAB-vxyf3vvgJ6i1am3ltmrLa?dl=0

 

for  watching it on your computer , you must download a STL viewer like:

https://ultimaker.com/fr/software/ultimaker-cura

https://3d-viewers.com/fr/stl-viewer.html

its free and easy to install.

enjoy

[DPS Ammonite]

2 hours ago, jnoun11 said:

hi boesse

because i work from more than 30 years everydays with bones material. and lot of time hen you find a rudist , its colony or reef ith lot of them and the phosphate formation didnt have invertebrate in calcite.

What are the physical properties of the fossil? Does it fizz in acid? Does it scratch with a metal knife blade? Will a copper coin or fluorite scratch it?

 

Sometimes fossils are moved from area to another; sometimes by humans and sometimes my natural forces.
 

 

[jnoun11]

hi dps

no reaction with formic acid, of course metal blade scratch the bone, and for the origin of this bones i will go soon to the phosphate mine for see the geological level and the associed fauna...at is point the logic conclusion is more elasmobranch ... wait and see more clues. the 3D file will show you the shape of the fossil.