Lithofacies and palaeoenvironmental reconstruction of palaeogene disang – barail transitional sequence in parts of kohima synclinorium, naga hills, North-East India

The Palaeogene Disang - Barail Transitional Sequence (DBTS) developed at the tip of Kohima Synclinorium, Naga Hills have been analyzed for their litho-facies characteristics using environment sensitive parameters viz. lithology, sedimentary structure, geometry, fossil content and palaeocurrent. A total number of six litho-facies – A: Sand – Conglomerate facies, B: Sand facies, C: Sand – Mud facies, D: Mud – Sand facies-i, E: Mud – Sand facies-ii & F: Debrite facies have been identified and studied along six vertical profile sections measured at different locations across the study area. A facies scheme depicting litho – facies interpretations in terms of processes has also been attempted. Based on the entire assemblage of characteristic sedimentary features of different litho-facies, a turbidite fed fan-slope depositional environment has been envisaged for the DBTS of the study area.