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- Title
Stream profiles as indicator of active tectonic deformation along the Intra-Foreland Thrust, Nahan Salient, NW India.
- Authors
Singh, Tejpal; Awasthi, A. K.
- Abstract
Stream profiles along five major streams from the Nahan Salient in the Western Sub-Himalaya were investigated with special emphasis on reactivation/active tectonics of the Intra-Foreland Thrust (IFT). Each of the stream profiles is observed to consist of two to three segments of different stream gradients. Each segment comprises a 'stream reach' and is marked by a distinct stream-length (SL) gradient index. SL index curves drawn for the five streams show anomalous increase in its values at the contact of two stream reaches. These distinct anomalies are found associated with the surface exposure of IFT in the field. Likewise low mountain front sinuosity (1.1 to 2.4) and low valley width to height ratios (0.1 to 0.33) also reflect active tectonic deformation along the IFT due to reactivation. The present stream profile approach is simpler, easier and faster to locate sites of fault related reactivation.
- Subjects
NORTHWESTERN India; ROCK deformation; THRUST faults (Geology); STRUCTURAL geology; SEDIMENTARY structures; SEDIMENTATION &; deposition; PHYSICAL geology
- Publication
Current Science (00113891), 2010, Vol 98, Issue 1, p95
- ISSN
0011-3891
- Publication type
Article