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 the
landslide is a when large amount of soil and rocks falls down the side of a
hill, cliff, or mountain.
Landslide can occur naturally
or because of human’s action. Natural causes of landslide includes erosion by
river, heavy rains or snowmelt, glacier melting, ocean waves which create over
steepened slopes, earthquakes, volcanic eruptions, thunder and lighting, and
ground water pressure. Human causes of landslide include vibrations from
machinery, traffic and road construction, blasting, mining, and logging.
Taken from http://en.wikipedia.org
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