Unidentified fossil

[Leviner12]

I'm trying to identify a fossil I found inside a chunk of Austin Chalk or in the "Fau" Cretaceous layer in collin county. I believe it might be some sort of coral. I am leaving it for now hoping to determine what it is before trying to fully extract it. Might not ever try to remove it. Any ideas or opinions? would be interesting to see what others think. It appears to have a foot then a thin shell like skin with a scalloped edge at the base growing horizontally from the "foot" like a shute or pod. Found in creek collin county North of Dallas Texas

[Leviner12]

[caldigger]

Looks kind of like a Gryphaea sp. ( oyster ).

[Leviner12]

[Mark Kmiecik]

53 minutes ago, caldigger said:

Looks kind of like a Gryphaea sp. ( oyster ).

I don't know. I'm seeing some bilateral symmetry not typical of Gryphaea sp., and the part protruding from it appears to be part of its internal structure. The larger item in the matrix is interesting as well.

[Fossildude19]

Some sort of Rudist, perhaps?

[JohnJ]

Could be an Inoceramid hinge fragment or part of an oyster.

 

[Leviner12]

I do think something similar to the Rudist fossils. 

[JohnJ]

I doubt rudist.  You might lightly scrub the broken edge with some water and post another photo.  Inoceramid hinges have distinctive needle-like, calcite crystal composition.

[Leviner12]

23 hours ago, JohnJ said:

I doubt rudist.  You might lightly scrub the broken edge with some water and post another photo.  Inoceramid hinges have distinctive needle-like, calcite crystal composition.

This edge?

[JohnJ]

12 minutes ago, Leviner12 said:

This edge?

 

 

It should not hurt to clean the whole area.