My son and I found this next to a reservoir in a super crumbly wall. We gave it to the rangers (we weren’t allowed to keep, since it was on public land).
We also found this,but have no idea what it is:
I’ve asked a couple paleontologists and they also weren’t sure.
Ah, a Brit! My son read a biography of Mary Anning when he was younger, and now is obsessed with Jurassic/Cretaceous aquatic reptiles! I’ll post a fun thing in that regard soon.
As for your holocene (well, Pleistocene in this case I guess) itch, my son and I just visited Hot Springs, South Dakota a couple weeks ago:
