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Authors
Affiliations
1 CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore - 560 037, IN
2 Department of Geology, Panjab University, Chandigarh - 160 014, IN
3 Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee - 247 667, IN
4 Wadia Institute of Himalayan Geology, Dehradun – 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 2 (2011), Pagination: 175-182
Abstract
Neotectonism in the Sub-Himalayan belt is not new. Moreover, the word 'Sub-Himalaya' is almost synonymous with 'neotectonic activity'. In the present paper, we report some of the most convincing geomorphic and structural evidences of neotectonic activity from the Sub-Himalayan belt in the Nahan Salient. The geomorphic evidences mainly include the four geomorphic surfaces identified from the transverse topographic profiles drawn parallel to the Himalayan front. These surfaces are commonly covered with terrace deposits that are tilted as well as faulted at a number of places. A number of faults, directly observable in the field, are normal in nature and they are oriented at high angles to the Himalayan Frontal Thrust (HFT). These faults are similar to the E-W extension in southern Tibet in response to the oblique convergence of India at ∼N20°E in the NW Himalaya. They are attributable to the kinematics of neotectonic compression along the HFT, the frontal ramp-oblique ramp-frontal ramp geometry of the thrust fault and related adjustments.
Keywords
Geomorphology, Neotectonics, Nahan Salient, Sub-Himalaya.
