Erratics resting on glacially polished and striated granitic bedrock along Murphy Creek, north of Tenaya Lake in Yosemite National Park, USA...........
I have been throwing out old geology and geomorphology text books, and in the process found this photo. It reminds us that if the Stonehenge bluestones were indeed scattered across the landscape of the downs, you do not necessarily expect to find large terminal moraines or indeed coherent glacial deposits in the immediate vicinity.........
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