FLUVIAL FACIES MODEL OF THE GANGA RIVER SEDIMENTS, INDIA

The river Ganga flows from the northwest to the southeast, following the lineaments developed in response to the Himalayan tectonics. Ganga sediments show a large number of facies developments throughout the study area from Hardwar to Kachhla. The active channel deposits are marked by the development of large-scale facies in gravel and coarse sand. Small-scale facies comprising fine sand, silt and clay are developed in inactive channel deposits and overbank deposits. The depositional model shows a progressive decrease in particle size, thickness of units and scale of cross-bedded sets from the lower to the upper parts of sequences as well as from upstream to downstream. The sedimentation of the Ganga basin is seasonally and tectonically controlled.