few items for identification...

[hndmarshall]

found a few interesting things need identifying....

found in gravel from the Brazos river east of Houston Texas.

First is a possible toe bone?, Bone fragment.

second is a tooth. Possible Bison but I think it looks more equine??. could be wrong though.

third is a possible small coprolite? passes the tacky test and when magnifies looking at a small chip in it there are orange and black colors inside can get pics if needed.

[jacob86795]

The first picture is a fragment of bone, which are difficult to identify, however the second picture is of a molar. It might be from a mammoth however I am unsure, Pleistocene material is not my expertise. The last picture is coprolite you are correct, likely from a turtle. Others on the forum can better id the molar. 

[digit]

The tooth is very definitely an Equus molar (upper).

 

https://www.google.com/search?q=equus+molar&tbm=isch

 

 

Cheers.

 

-Ken

[Shellseeker]

On your bone, it is a stretch with so little remaining but, it might be a deer calcaneum.  Photo courtesy of @Harry Pristis

[Brandy Cole]

The first picture looks like it could be a very worn hoof core to me, but I do think it's too worn to confirm an identification with any certainty. 

 

And as Ken said, the second is a horse molar.

 

Neat finds!