ok, i used to see these types of things at 2 homes in portland, or. they were about 2 blocks from my home. i used to check them out in peoples front yards while i was walking billy. then, suddenly, i'm hiking in basalt mountain yesterday and suddenly in the midst of tons of rocks there was a stretch of maybe 30 feet where all of these were spread out.
i love that you almost don't notice them. yet, somehow they stand out and you suddenly notice them.
who knows about these? i have no idea the purpose....maybe just a little more beauty in the world?