Permafrost: The Untold Water Sculpting From Below

 

The energy produced by the force of gravity acting on this house created a "thaw bulb," which was enough to melt the unseen permafrost below.

Permafrost is a definite ¬†culprit in the sculpting of land in the upper regions of the northern hemisphere. Its land sculpting ability lies in the karst category, yet it is not mentioned in our text. Click here ¬†to see a few videos on the effects of permafrost on land topography. The third video, “Permafrost Patterns,” gives a brief explanation of thermal karsts; Anyone who has flown over interior Alaska has seen evidence of this type of karst by the hundreds, and this could be an easy place-based eye-candy addition to a lesson on the land sculpting ability of water.

 

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