natgeofound: Iron and manganese seepage creates streaks on a sandstone wall on Lake Powell in Utah, July 1967.Photograph by Walter Meayers Edwards, National Geographic

natgeofound: Iron and manganese seepage creates streaks on a sandstone wall on Lake Powell in Utah, July 1967.Photograph by Walter Meayers Edwards, National Geographic

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from: https://atuwilson.tumblr.com/post/59596687762