

Avalanche is one of the natural forces. Avalanches are the large amount of snow that fall down the mountains’ sides. Its power isn’t lesser than earthquakes or flood. It is the destroyer and killer of the winter time.
http://nsidc.org/snow/gallery/avalanche.jpg

Types of Avalanches There are two kinds of avalanches, loose and slab. Loose avalanche happens when the snow bank starts to collapse and slides down the hill. Slab avalanche usually occurs after the loose avalanche, forms as the mass of heavy, melting snow that separates from the slope and slides down the hill. It can be also called as the delay action of loose avalanche.http://www.avalanche.org/~moonstone/forecasting/snow%20avalanche%20their%20characteristics,%20forecasting%20and%20control.htm

How do avalanche form?