Late-Pleistocene Syngenetic Permafrost in the CRREL Permafrost Tunnel, Fox, Alaska

Authors

• M.Z. Kanevskiy
• H.M. French
• Y.L. Shur

Files

Description

Late-Pleistocene syngenetic permafrost exposed in the walls and ceiling of the CRREL permafrost tunnel consists of ice-and organic-rich silty sediments penetrated by ice wedges. Evidence of long-continued syngenetic freezing under cold-climate conditions includes the dominance of lenticular and micro-lenticular cryostructures throughout the walls, ice veins and wedges at many levels, the presence of undecomposed rootlets, and organic-rich layers that reflect the former positions of the ground surface. Fluvio-thermal modifications are indicated by bodies ofthermokarst-cave ('pool') ice, by soil and ice pseudomorphs, and by reticulate-chaotic cryostructures associated with freezing ofsaturated sediments trapped in underground channels.

Publication Date

4-17-2008

Keywords

permafrost, permafrost tunnel

Recommended Citation

Kanevskiy, M.Z.; French, H.M.; and Shur, Y.L., "Late-Pleistocene Syngenetic Permafrost in the CRREL Permafrost Tunnel, Fox, Alaska" (2008). Cold Regions Research and Engineering Laboratory (CRREL). 1.
https://ualaska.researchcommons.org/uaf_crrel/1

Handle

http://hdl.handle.net/11122/1192