Turtle coprolite?

[Lone Hunter]

This is from mix of Eagle Ford and Alluvium, had it for awhile but just ran across pictures of turtle coprolite and thought it fit, right size, shape and colors I've seen.  Also weighs light.  Knowing my luck it's geological but that's ok it's very interesting.

 

I snuck in another one I suspect is coprolite 

Edited April 24, 2021 by Lone Hunter

[Thomas.Dodson]

It certainly is interesting and has the general appearance of a coprolite. I don't have the experience to say what it is really but @GeschWhat is very knowledgeable regarding coprolites so let's see what she says. @JohnJ is also knowledgeable of the upper Cretaceous in Texas so I'll tag him as well.

Edited April 24, 2021 by Thomas.Dodson

[Fossildude19]

The second item looks like the internal mold of a gastropod. 

[ClearLake]

Agree with Tim on the second one, gastropod internal mold.

[GeschWhat]

The first looks like a coprolite, but doesn't look like those I've seen from the Eagle Ford Group. They are usually lighter colored and stick if you touch them to the tip of your tongue. I'm not an expert in Texas geology, but but so far as coprolites go, it looks like something I would expect from the Taylor Group (Ozan). So I'm guessing it would have been part of the alluvium. I would not classify it as a turtle coprolite. With few exceptions, it is never a good idea to assign coprolites to a specific donor.  I would keep it in my "likely carnivore coprolite" drawer.

 

I agree on the second one being a gastropod steinkern as well.