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.
References in periodicals archive ?
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.