active layer
(redirected from Active soil layer)active layer
[′ak·tiv ′lā·ər] (geology)
That part of the soil which is within the suprapermafrost layer and which usually freezes in winter and thaws in summer. Also known as frost zone.
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At Spitsbergen, Hallet's group found just this relationship: The diameter of a sorted circle was 210 centimeters while the active soil layer measured about 1 meter deep.
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