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The base of the pingo tends to reach its maximum diameter in its early youth.
Relict hydrostatic (closed-system) and hydraulic (open-system) pingos may be distinguished from each other by determining whether lacustrine (lake) deposits are associated with the formation.
However, freeze and thaw cycles influence landscapes outside areas of past glaciation.
Therefore, periglacial environments are anywhere that freezing and thawing modify the landscape in a significant manner. Evidence of collapsed pingos in an area suggests that there was once permafrost.
The groundwater is put under artesian pressure and forces the ground up as it makes an expanding ice core.
It is not the artesian pressure itself that forces the ground up, but rather the ice core that is being fed the water from the aquifer.