(from the article `permafrost`) 3. Foliated ground ice, or wedge ice, is the term for large masses of ice growing in thermal contraction cracks in permafrost....and sub-Arctic). It is estimated that permafrost underlies nearly 25 percent of the terrestrial land surface. Various forms of ground ice are ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/i/4
Wedge-shaped, ice body composed of vertically oriented ground ice that extends into the top of a permafrost layer. These features are approximately 2 to 3 meters wide at their top and extend into the soil about 8 to 10 meters. Form in cracks that develop in the soil during winter because of thermal contraction. In the spring, these cracks fill with...
Found on
http://www.physicalgeography.net/physgeoglos/i.html
narrow ice mass that is 3 to 4 meters (10 to 13 feet) wide at the ground surface, and extends as much as 10 meters (33 feet) down; a decrease in temperature during the winter leads to ice wedge cracks in the ground around ice wedges; during the summer, these cracks accumulate melt-water and sediment, forming pseudomorphs.
Found on
https://nsidc.org/cryosphere/glossary?page=13
No exact match found.
