Vol. 3, Issue 6, Part L (2017)

Abstract
This study region lies between Ganga & Yamuna Rivers in N.E. & S.W. direction and then indogangetic plane in the South and doon gravels in the North with the reference to capital Dehradun (U.K.). The present study aims to investigate the geomorphology & geology of the above region so that the soil of the region can be studied under classification, origin, depletion and remedial measures. The study region is sloping towards North, maximum height of the Siwalik ranges upto 3000 ft., the area to Ganga is NS and Yamuna in NW is traversed longitudinally by Suswa & Asan rivers confluansing with the Ganga & Yamuna. These two rivers are separated by Dehradun Asarori Mussoori water divide more of less at the centre. Geologically these are consist of Middle Shiwalik and upper Shiwalik with recent Alluvium. Geomorphological the morphounits includes hills of the structural origin, hills of denudation origin and units of fluvial origin. The soil materials of the study region have been derived mainly from Shiwalik ranges consisting of boulders, cobbles, pebbles sand, silt and clay minerals. The article describes them origin. The soil so generated is depleted by biotic and abiotic causes like weathering, erosion by water, run off over plounging, over grazing and deforestation. The present article suggest the conservation measures for the soil for the betterment of the population of the study region to proper utilization of the precious material resources available to them.