Natural cracks and fissures present in hard rocks cause their breaking. Especially,at the time of heavy rains, water entering these cracks causes weathering of these rocks.weight increases. This is called collapse of rift means landslides.
पोर्तॉ रिको येथील सन १९८५ मधील जमीनीची घसरण
स्वीडन येथील एक घसरण-सन १९५०-यात एका माणसाचा मृत्यु झाला.