...found a few things, but nothing out of the ordinary. I decided to try my luck at the Fullerton Arboretum today, because they have so many more rocks there than I do here at home. But most of them were dry and barren underneath. I was also limited to the size of rock I could move, because they had to be small enough to maneuver with one hand, while I held the camera ready with the other.
I put my humble findings in a Flickr set.