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Fox Permafrost Tunnel Extension 25m
Alaska

Drilling for the season was completed at about this depth into the new extension of the Fox Permafrost Tunnel.  Though progress was going great, scientists from CRREL were eager to begin construction of the entrance bulkhead which will protect the tunnel from the damaging heat of summer.  Here you can see that the tunnel has bored though a series of ice wedges, likely over 10,000 years old.

Copyright: Matt nolan
Type: Spherical
Resolution: 15000x7500
Uploaded: 25/12/2011
Updated: 27/08/2014
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Tags: fox; permafrost; tunnel; permafrost tunnel; ice; fairbanks; matt nolan; nolan; 2011
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Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait. Approximately half of Alaska's 710,231 residents (as per the 2010 United States Census) live within the Anchorage metropolitan area. Alaska is the least densely populated state of the U.S.Source: http://en.wikipedia.org/wiki/Alaska