Lubricating Layer 1
Lubricating Layer 1 : (1) A layer within a snowpack which has been wetted by free water percolating through the snow. Sometimes any weak layer or cohesionless layer which has acted as the basal zone in a slab avalanche. (2) A layer with weak internal strength and/or poor bonding to adjacent layers which facilitates mechanical failure within the snow pack. A recognizable lubricating layer may or may not be present in an avalanche
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