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#pingo #permafrost feature #ice-cored hill #arctic #geocryology

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#pingo formation #frost heave #cryoturbation #permafrost #ice lens #geocryology #arctic geology

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#pingo #arctic landscape #ice-cored hill #permafrost feature #geocryology #tundra

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#pingo #permafrost mound #arctic geology #ice lens #hydrolaccolith #geocryology