South Dakota Fossil Finds-What Is This?

[autographcollector11]

I found this in southwest South Dakota on private property. There are three different items posted here. Appear to be bones.

Can you help?

Thanks

[Fruitbat]

The item in the first picture appears to be a fragment of a turtle shell (likely Stylemys nebrascensis...the most common large turtle in the Eocene/Oligocene White River Badlands of southwestern South Dakota, northwestern Nebraska and southeastern Wyoming). I'm not quite sure about the second...it looks to be more geological than paleontological. The last two pictures appear to be an unidentifiable bone fragment of some sort...also likely Eocene/Oligocene in age.

-Joe

[autographcollector11]

Here are better pictures of some of the pieces......