Great prismatic spring

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Yes, the clouds above the water are blue and red. Or, at least that's the astounding illusion created by the brilliantly colored water, mineral deposits and bacteria create when they reflect sunlight back up into the steam above. You see it from a half mile away and you're sure you're going to need a gas mask to approach any closer. But they let you walk right up to it: 100 yards, 100 ft, still blue and red, you're expecting to choke and die any second now, 10 feet, 5 feet, and then you see that the clouds are really white and smell the same as all the other Yellowstone springs: hydrogen sulfide.

Yellowstone is pretty frikkin amazing.

4 thoughts on “Great prismatic spring

  1. joel hanes

    Yes it is. And that’s when it’s dormant.

    I’m pretty sure I don’t want to be around to see what it’s like in late-stage eruption.
    (Last time, 640,000 years ago, it dropped tens or hundreds of meters of welded tuff from California to Iowa, and from the Pecos almost to Lake Winnipeg.

    Some day that superplume will blowtorch itself across the plains to the Mississippi, and the geology of the stable interior craton will change dramatically.

      1. joel hanes

        we’ve had it so briefly

        Good records only go back four or five thousand years; much less most places.
        Floods are some of our oldest stories, yet we have only the beginnings
        of an idea what a “thousand-year flood” might be.
        If we survive, someday we’ll have a statistical handle on what
        a once-per-ten-thousand-years bolide or volcanic eruption or solar storm
        might be like.

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