Unidentified Cretaceous fossil, jaw fragment maybe?

[fossil_lover_2277]

I found this in a creek in eastern North Carolina that cuts through Cretaceous Bladen formation sediments. I thought it was a weirdly shaped rock at first, but looking at it closer, it looks like a fossil. There is a flat surface with some regularly placed bands, similar to a ray or fish grinding plate. I have no idea what this is. Anyone have any ideas?

 

 

The bands above ^^^ are faint in the pic, but they are definitely there, much easier to see just looking at them with your eye.

 

 

Edited October 30, 2021 by fossil_lover_2277