permafrost

     

In geology, permafrost or permafrost soil is soil at or below the freezing point of water (0 °C or 32 °F) for two or more years. Ice is not always present, as may be in the case of nonporous berock, but it frequently occurs and it may be in amounts exceeding the potential hydraulic saturation of the ground material. Most permafrost is located in high latitudes (i.e. land in close proximity to the North and South poles), but alpine permafrost may exist at high altitudes in much lower latitudes.

Trivia about permafrost

  • Ground that's always frozen in polar regions
  • (Sarah of the Clue Crew presents the clue.) Some define the boundary of the Arctic as the southern limit of the icy region with this, perennially frozen subsoil
  • Term given to the tundra's always-frozen soil layer
  • Also called pergelisol, it's the perennially frozen subsoil of Arctic & subarctic regions
  • In Arctic or subarctic tundra, it's perennially frozen subsoil, also called pergelisol
  • (Paleontologist Dan Fisher delivers the clue)Lyuba's well preserved body was revealed when this permanently frozen subsoll melted, exposing her small form near the Yuribey River

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