Cold Regions Research and Engineering Laboratory (CRREL) Permafrost Tunnel Tour Hosts: Yuri Shur and Mischa Kanevskiy
June 18, 2017
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Clear ice lenses are thought to have formed in cave “pools” where underground water channels were blocked and then frozen.
Yuri Shur with the MHAers at the far end of the Main Adit.
(Left) A massive ice wedge is visible in the side and ceiling of the tunnel.
(Above) Test holes have been used to extract sample cores of the ice in the wedges and lenses.
(Left and above) Fossils are abundant in some of the silt layers in the tunnel.
The MHAers are shown leaving the CRREL Tunnel, one of the most unique “mines” ever visited on an MHA field trip.
The existing CRREL Tunnel complex (yellow) is currently being enlarged (blue) to provide a second entrance/escape adit and to enable additional research to be conducted.
Photos courtesy of Mike and Pat Kaas CLICK HERE FOR THE NEXT PHOTO GALLERY
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