Split Mountain Crazycline
Split Mountain is an anticline -- rock folded upwards to form a ridge. But we were there at the same time as a geology field trip; & doing a little eavesdropping, we learned the correct technical term for the baroque peak of the fold (seen here): "crazycline."
When I walked over to stand in front of the wall & do my best to look like a human being for scale, I also discovered my one & only specimen of Orcutt's aster, growing straight out of the rock.
Rumor has it (see comment from Tom Feldman below) that this plant has been there since at least 1989.