Structural analysis of main boundary thrust and Himalayan
Rivers Sindhu (Indus) and Tsangpo (YarlungZangbo) carved out their drainages through this tectonized zone. The ITSZ is traced westwards skirting parabolically around the NangaparbatHaramosh promontory of Indian landmass, where it is described as Main Mantle Thrust (Tirkheli et al. 1979).