Panoramic virtual tour of the CRREL Permafrost Tunnel

tunnelMatt Nolan, from the University of Alaska Fairbanks has compiled some spectacular panoramic views from the permafrost tunnel in Fairbanks. You can have a look at those here:

The United States Army maintains and operates the CRREL Permafrost Tunnelnear Fairbanks, Alaska. CRREL is short for the U.S. Army’s Cold Regions Research and Engineering Laboratory, part of the U.S. Army Corps of Engineers Engineer Research and Development Center. The Permafrost Tunnel was excavated into a man-made escarpment, and is approximately 110 meters in length, 2 to 2.5 meters high, 4 to 5 meters wide, and 15 meters below the surface. The tunnel’s frozen walls expose a continuous cross section of undisturbed, perennially frozen, fossil-rich silt, sand, and gravel on top of bedrock. Also exposed in the tunnel are a variety of ground ice types, including ice wedges, thermokarst cave ice, and ice lenses, each described further in the section. Visible throughout the permafrost are a diverse assemblage of animal fossils and plant remains.
(Text: Matt Nolan)