Engineering Geology in Himalayas Major Discontinuities system of the Nepal Himalaya and their Engineering Significance Discontinuity simply is a plane or surface that marks a sharp change in physical and chemical characteristics in a soil or rock mass. A discontinuity may be a bedding, schistosity, foliation, joint, fracture, cleavage, fissure or crack, or fault plane. Discontinuity results in anisotropism and heterogeneity. Major discontinuities system of Nepal is summarized as 4 tectonic zones: Indo-Gangetic Plain Siwalik or Sub Himalaya Lesser Himalaya Higher Himalaya Tethys Himalaya These tectonic zones are separated from each other by different faults. Main Frontal Thrust: This is the southernmost thrust of Nepal Himalaya which separates the Terai plain from Siwalik zone. It is considered as the active thrust of Nepal Himalaya. This thrust zone is a...
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