The Middle Siwalik succession dated between 9 and 5 Ma represents a multistorey sandstone complex. The sediment supply for the Middle Siwalik group originated from the main provenance of the rising Himalayas. With vertical facies variation from sandstone-mudstone to sandstone-mudstone-conglomerate with a thickness approximately . The unique part of this multistorey sand complex is the fact that it is underlain by a major erosional surface which extends laterally for hundreds of meters. individual stories vary in thickness and are recognized by the presence of intra and extra-formational clasts along the base of each storey. These facies assemblages suggests a deposition by sheet floods in a braided channel environment. The vertical stacking of this multistorey sandstone complex further indicates of a channel bar that migrates with channels existing predominantly as depositional sites. Finally, the Middle Siwalik is conformably overlain by the Upper Siwalik Sub-group.