William W. Shilts Geologic Image Gallery

Keyword - pingo: "An Eskimo term for a conical, commonly more or less asymmetrical mound or hill, with a circular or oval base and commonly fissured summit, occurring in the continuous and discontinuous permafrost zones, which has a core of massive ground ice covered with soil and vegetation, and which exists for at least two winters (Brown and Kupsch, 1974)."

  0108 - Aerial view of low, pingo, or palsa-like features
  0243 - Ground view of palsa-like features
  0244 - Low-altitude photo of palsa-like features
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
     
  
  
  
  
  

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ILLINOIS STATE GEOLOGICAL SURVEY
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Updated 04/25/2007 CAB
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