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Brooks Range Alaska Range Chugach Range Figure 2: Approximate distribution
of permafrost in Alaska. Permafrost is widespread in the northern part of the
Northern Hemisphere (Figure 1), and it is estimated to underlie 20 percent of the
Ice content Figure 5: Character and distribution of permafrost in Fairbanks,
Alaska, area. From T. Pewe, Permafrost ind its Effect on Life in the North (1966);
Oregon State University Press Thermal contraction theory Indication of former ...
The most spectacular landforms associated with permafrost are pingos, small ice-
cored circular or elliptical hills of frozen sediments or even bedrock, 10 to more
than 200 ft (3.05 to 61 m) high and 50 to 1,500 ft (15.25 to 457.5 m) in diameter.
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review