McFaddin Beach: Turtle, bone? Or ?

[KingsburyFossilHunter]

Hi everyone!

 

We made a trip to McFaddin Beach a few months ago (mishmash of Pliestocene materials wash up), and found these two items, which _at first_ we thought were 1. A bone (left) and 2. a turtle scute (right), all photos.

 

BUT - the item on the left, the bone, has kind of a nice finish, with small bubbles, on the inside (lower left photo). ??

 

And the item on the right, the scute, has a very interesting texture on the two flat faces. Could it still be turtle? Or could it  be something else?

 

Your input appreciated. Thanks in advance!

 

Edited August 12, 2020 by KingsburyFossilHunter
added text

[Rockwood]

Glyptodont perhaps ?

[GPayton]

The first fragment seems like part of a long bone, hence the partial "canal" cavity on one side. The second fragment could also be bone, but my gut is telling me turtle or tortoise. I could be wrong, but they reason I'm leaning that direction is because of the texture shown in the leftmost picture on the bottom row. I've collected MANY pieces of tortoise shell from the Brazos in the past and a good majority have those distinctive crisscrossed grooves.