Bravo!! You never fail to impress me.
I'd like the geologists on this platform to weigh in. That would be fascinating. I know nothing about rocks, but I do find geology fascinating--not so much the extraterrestrial kind, but the kind that reveals the history of the planet. It's a kind of language, geology. If you can read it, mysteries of our past will be revealed.
Really nice job/investigation @litguru
Thank you, @agmoore! It was fascinating following the trail crumbs that would lead me to an answer. The geology around these parts has experienced some tectonic upheavals, so it's a great place to study those processes. The planet as a whole has gone through many changes across millions of years, so the secrets are partly buried in those rocks and stones. It's a mysterious chapter in the history of earth and planet formation in general.