Glacial Formations


	Pingos: Open System	Pingos: Closed System
	Water collects in the valley bottom within an area of talik When temperature falls talik becomes frozen and expands pushing the surface up into a dome	Water from lakes seeps into talik Temperature falls, surrounded by advancing permafrost Talik freezes, expands, pushed the surface into a dome Ice melts, depression forms, called an ognip
	Talik	Transportation
	Unfrozen ground	Supraglacial - material carried along surface of glacier (superman) Englacial - debris, previously supra glacial which gets covered by accumulation Subglacial - debris on base caused by plucking or abrasion (submarine)

Water collects in the valley bottom within an area of talik
When temperature falls talik becomes frozen and expands pushing the surface up into a dome

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