needle ice


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needle ice

[′nēd·əl ‚īs]
(hydrology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Chapter 2 adopts a qualitative approach to explain the temperature and moisture conditions under freeze and thaw and describes the resulting processes of cryosuction, needle ice formation, frost heaving and thaw settlement, ground cracking, upheaving of objects, sorting of earth materials, and weathering, with additional mention of karst and seawater in permafrost areas.
The long needle ice crystal habits of the observed frost flowers (Fig.