From the Kiamichi Formation Cretaceous… north Texas Part three

[98feetdeep]

Here’s  the last item…(also threw in a the last photo of a good ammonite remnant, this one had great ridges)

…this curve looks like ammonite but doesn’t have the ridges the others in the area all seem to have..stumped. I’m leaning toward ammonite….

thanks
patrick

[DatFossilBoy]

Last picture is indeed a section of an ammonite 

[98feetdeep]

That I knew but the other has me stumped..could be botanical I guess  

[Fossildude19]

Could also be an infilled burrow/ichnofossil of some sort.

 

@JohnJ

[JohnJ]

I think the first is a burrow.  In a fragment that large, you would typically see evidence of septa on the sides and an impression of the siphuncle on the inner radius if it was part of a Kiamichi ammonite.