Pretty much the same I did Lenn. We have incredible amounts of petroglyphs here abouts and I've often sort of sketched some of the interesting ones I've liked. I've also collected rocks that have been "sunburnt" by facing the sun for a million or more years, out on the desert pavements (not talking about roads) of uplifted alluvial fans. So I've chipped some of those designs into some of those rocks, and this is the result.
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I like the different rock photos.