Pingo

[ping-goh] /ˈpɪŋ goʊ/

noun, plural pingos. Geology.
1.
a hill of soil-covered ice pushed up by hydrostatic pressure in an area of permafrost.
2.
a hill of similar origin remaining after the melting of permafrost.
/ˈpɪŋɡəʊ/
noun (pl) -gos
1.
a mound of earth or gravel formed through pressure from a layer of water trapped between newly frozen ice and underlying permafrost in Arctic regions
pingo
(pĭng’gō)
Plural pingos or pingoes
A large mound or dome of ice covered with soil. Pingos are about 30 to 50 m (98 to 164 ft) high and up to 400 m (1,312 ft) in diameter and are found in Arctic regions. They are believed to form in basins (such as drained lake beds) as a result of the freezing and upward expansion of water held in subsurface soil, which initiates the doming, as well as by the rising and freezing of water trapped beneath or within the permafrost, as a result of hydrostatic pressure.

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