re: but California layered roccks lack tektittes
When I first saw the ‘blueberries’ my first thought was tektites (The image of the glass Moon beads popped into my mind), but now I am not so sure. For one thing, they sure are evenly spread out through the rocks. I would expect them to be in certain layers if they were tektites. Also, they all seem to have hematite. I would expect them to vary some in chemical composition if they were tektites.