Stop 1: College Peat Ice WedgesTrip leader Kenji Yoshikawa (a.k.a. "Tunnel Man") discussing permafrost

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Steve Clifford assisting Kenji with drilling into ice wedge

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Borehole and ice core segment

Ice Core Segment

Stop 2: The Alyeska Pipeline Visitor's Center

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A retired "pig"

Another retired "pig"

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Stop 3: The Fox Permafrost TunnelUS Army Corps of Engineers Cold Regions Research and Engineering Laboratory

Steppe bison bones

Ice wedge beneath a frozen cave lakeCirca 30,000 or 40,000 years ago

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Stop 5: O'Conner Creek pingos site 1Mud volcanoes such as this one occur in a pond formed after the removal of a pingo, now effectively a spring

Stop 6: O'Conner Creek Alpha PingoKenji describing the pingo, a 100x60 m ellipse about 10.5 m high with a breached crater in its center



Scenery northwest of Alpha Pingo

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