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Philip, G.
- LANDSAT Image Enhalncement for Mapping Fluvial Palaeofeatures in parts of Middle Ganga Basin, Bihar
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Authors
Affiliations
1 Department of Earth Sciences, University of Roorkee, Roorkee 247667, IN
2 National Remote Sensing Agency. Balanagar. Hyderabad 500037, IN
1 Department of Earth Sciences, University of Roorkee, Roorkee 247667, IN
2 National Remote Sensing Agency. Balanagar. Hyderabad 500037, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 37, No 1 (1991), Pagination: 63-74Abstract
An area in the Middle Ganga Basin, lying around Monghyr, Bihar, has been selected for delineation of fluvial palaeofeatures. The investigation is based on aerial photographs LANDSAT MSS and TM data products and ground data. Digital enhancement of LANDSAT MSS and TM data by linear contrast stretching and ratioing has been found to be highly powerful in identification and mapping of subtle fluvial palaeofeatures. Based on the above interpretation, a summary of the fluvial palaeo-history is presented.Keywords
LANDSAT, Ganga Basin, Geomorphology, Bihar.
- Morphotectonic Evolution of Parduni Basin: An Intradun Piggyback Basin in Western Doon Valley, NW Outer Himalaya
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Authors
Affiliations
1 Wadia Institute of Himalayan Geology, 33 Gen. Mahadeo Singh Road, Dehra Dun - 248 001, IN
1 Wadia Institute of Himalayan Geology, 33 Gen. Mahadeo Singh Road, Dehra Dun - 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 2 (2009), Pagination: 189-199Abstract
During the course of mapping of active faults in the northwestern Outer Himalaya (using CORONA photographs, multispectral satellite data of Indian Remote Sensing satellite (IRS) and aerial photographs) we have identified an isolated basin of Quaternary and Holocene sediments resting unconformably on Siwaliks, around Parduni, in the northwestern Dehra Dun (Doon) valley. The region around Parduni is tectonically very complex and is traversed by active thrust faults to its north and south and strike slip faults to its east and west. The uplift and southward shift along the strike slip faults on both sides and the Markanda thrust edging to its south, the Parduni has developed as an intradun basin and now remains isolated from the main Doon valley. Based on the OSL age data widespread deposition of Quaternary alluvial fan sediments, the dun gravels, is inferred to have initiated around 34 ka BP in the western part of the Doon valley, while the sedimentation in the Parduni Basin started only around 27 ka BP, which more or less ceased around 20 ka. The southward movement of the Parduni Basin as a piggyback basin is ongoing with recent alluvial deposits covering the dun gravels tectonically overlain by the Siwalik sandstone and mudstones in the hanging wall of the Markanda thrust. The present communication discusses the development and evolution of the Parduni Basin vis-a-vis the configuration of the Doon valley in the northwestern Outer Himalaya and the prevalence of tectonics expressed or demonstrated in the active Himalayan Front.Keywords
Morphotectonics, Piggyback Basin, Duns, Himalaya.References
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