A landslide is a geological phenomenon which includes different types of ground movement, such as rock falls, deep failure of slopes and shallow debris flows. We usually also say that landslide is when a large amount of soil and rocks falls down the side of hill,cliff, or mountain.
Landslide can occur naturally or because of human’s action. Natural causes of landslide includes erosion by river, heavy rains and snowmelt, glacier melting, ocean waves which create over steepened slopes, earthquake, volcanic eruptions, thunder and lightning, and ground water pressure. Human cause of landslide includes vibrations from machinery, traffic and road construction, blasting, mining, and logging
Taken from: en.wikipedia.org/wiki/Landslide
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