Two North Carolina beach finds, one with bite marks?

[Duroo]

Hello!

 

I am a high school science teacher from North Carolina, USA. I recently visited Cape Lookout, NC, which is part of the Outer Banks. I found both of these fossils on the beach and am wondering what they might be. I want to have some kind of ID in mind when I show my students. I have no idea what geologic time period they are from.

 

The first one appears to be a rib or long bone fragment. Possibly from a Sirenian or a Cetacean.

It has some weird weathering on one side that almost looks like bite marks.

 

 

The second one appears to be a fragment either from some large animal's skull or maybe a piece of a large turtle/tortoise shell.

 

 

These are only guesses, please let me know if you have any idea what these may have belonged to, and if the weird weathering pattern might actually be bite marks.

 

I have several other beach finds that I would love some help identifying if this post goes well.

 

Thank you in advance!

[Fin Lover]

I agree that they appear to be a bone fragment and turtle, respectively.  I'm not sure if the bone can be IDed further, but someone else who also knows the formations that wash out on that beach will be along shortly.

Edited June 20, 2023 by Fin Lover

[bambino2525]

I also just found a bone on cape lookout. 

[Duroo]

Do you have a picture?

[sixgill pete]

These are both extremely water worn broken pieces of bone and honestly cannot be ID'd beyond that. 

[digit]

The first one is certainly not a sirenian rib bone as they are solid through and have not cancellous bone on the interior. Beyond that, it will likely remain a chunk-o-saur (unidentifiable) as there are no diagnostic features and the bone fragment is well worn. The ding in the side could have come from any number of sources and is likely not feeding damage. The second one definitely has a turtle/tortoise feel to it with the parallel flattened sides. The suture texture feels turtle/tortoise as well. Only a small percentage of fragmentary post-cranial bones can be identified to species and skeletal element. Teeth are more diagnostic--fragmentary worn bones, not so much.

 

Hope this helps a little.

 

 

Cheers.

 

-Ken