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. The Astrobiology Web: Your Online Guide to the Living Universe TM
An Antarctic Photo Album, Volume 2
by Dale Andersen

Text and Photographs ©copyright 1996 Dale T. Andersen. All Rights Reserved. Reproduced with permission.

[276, 34k jpeg] Polygonal Cracking, Alatna Valley

Polygonal cracking can be seen on the floor of Alatna Valley. These polygons are a result of freeze thaw processes in permafrost. The polygons in this photo have been highlighted by recent snowfall.


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