Gray forest soils are located on limestone rocks. Agricultural lands are brown forest soils and soils meadow mountain. There are grey forest soils between 500 and 1200 meters heights, then come Velvet Lands extending the left slope of this valley from Mbaskollata to Shoshan at height 400-900 meters. Their geological construction (alps) is diverse, with the oldest formations, those paleozoic ones, with which are related quartz mineral properties in river valley. Limestones that come from mesozoic, are wider spread, and serve as the basis of bauxite. They form the alps main ribs. Mixed with dolomite and modeled by karsts they form to Alpines a very bitter relief. Insoluble flysch deposits have formed a very harsh terrain. In the region, the carbonatite rocks are dominant and only in the villages of Valbona and Dragobia the schist nucleus of the Alps appear.