There is an abundance of petroglyphs. I used Alex Patterson's book, "A Field Guide to Rock Art Symbols of the Greater SW," to try to interprete what the rock art was saying. Here, the mult-headed robot-looking figure may be the Hokokam representation for "Tlaloc, the goggle-eyed rain god of Mesoamerica." The big horn sheep representations are somewhat obvious. Patterson didn't have anything like the tadpole-like symbol on the far left center.
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