Today, I would like to show you something else that I found there, and ask you to tell me just what the hell it is.
Here we go: an outcrop of the volcaniclastic sediments in this area (stratigraphically beneath the Bishop Tuff), where you can find orb-like hollow structures in the weakly lithified rock. Here’s a couple:
I have a guess what’s going on here, but I’m by no means certain. Any ideas from the peanut gallery about what this strange thing is?