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.
I am a layman with no expertise, so guage this guess accordingly:
Fossilized bone or a fossilized aquatic tubeworm/sea cucumber thing.