A frozen layer of ground, at the base of the active layer, which may persist for one or several years. Also known as intergelisol.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(1) A lens of frozen rock in the active layer of permafrost rocks that in some years remains unthawed through the warm period until the beginning of the next seasonal freezing.

(2) An accumulation of snow that lasts through the summer on shaded slopes or in depressions.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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