One of the most curious geologic formations in Missouri is found at Elephant Rocks State Park. Giant boulders of 1.5 billion-year-old granite stand end-to-end like a train of circus elephants. The formation of this extraordinary herd of elephants began during the Precambrian era about 1.5 billion years ago. The distinctive granite, which is a vibrant pink in color with green lichen, is known as "Missouri Red."
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