fossil?

[hndmarshall]

found this in a gravel load from the Brazos river west of Houston

 

Any ideas on what it is?...thank you in advance

[ynot]

There is a cross section of a gastropod bottom center. not sure about the other thing (maybe another gastropod).

[Rockwood]

3 hours ago, ynot said:

(maybe another gastropod).

I would say stacked like cordwood. 

Their shape is conducive to it apparently. 

[thebluecatapilla]

Definitely some gastropods in there, the one lateral view and the one X-section. And also looks like there are some bivalve X-sections as well.