These were the lowest-situated crags we encountered today before turning around. They are clearly old riverine alluvial deposts upthrust by plate tectonics and now being heavily weathered.
The fellas backed back down the road a ways and turned around at the location seen here while I stayed behind to capture images and view the surrounding terrain.
The Queen Bee Mine is a gold-bearing hardrock deposit that was not economically viable and abandoned shortly after being excavated.
The entrance to this adit used to be blocked by a heavy metal grate but that kept getting yanked off by drunken idiots with winches so now it remains open but given the adit ends about 20 feet into the hill there seems to be no need for it.