Physiographical study on Manabum

  • Gaurisankar Gogoi
    Department of Applied Geology, Dibrugarh University


  • Boundaries of Upper Assam Shelf has been experiencing neo-tec- tonic uplifting because of periferial presence of several thrust systems of Himalaya and Naga-Patkai range. Manabum hill of Namsai District of Arunachal Pradesh has been manifested as an anticlinal structure resulted from blind thrust propagation of thrust systems. Manabum is juxtaposed between Lohit and Noa-Dihing rivers of Upper Brahmaputra valley. Remote sensing and GIS based study on physiography of Manabum revealed that 27.11% of total area is under 87m to 240m above m.s.l., 47.97% of total area is under 240m to 380m above m.s.l. and 24.9 % area is under 380-820m elevation. The structure has expe- rienced differential rate of upliftment as observed from transverse sections.

  • Key words: Digital elevation model, physiography, elevation profiles

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