Vincent Godard Assessing along-strike variability in deformation patterns along the Himalayan arc is of primary importance to decipher the relative contribution of the main tectonic structures in accommodating the India-Eurasia convergence. In active mountain ranges a dynamic coupling exists between tectonic and denudation, with high rates of rock uplift along thrust faults usually coincident with high denudation and exhumation rates e.
Anthony Dosseto Reconstructing how rivers respond to changes in runoff or sediment supply by incising or aggrading has been pivotal in gauging the role of the Indian Summer Monsoon ISM as a geomorphic driver in the Himalayas. Here we present new chronological data for fluvial aggradation and incision from the Donga alluvial fan and the upper Alaknanda River, as well as a compilation of previous work.
For previously dated deposits, our OSL ages are shown to be systematically older than previously reported ages. This most likely reflects decreased stream power during periods of weakened monsoon.
In addition, in-situ cosmogenic beryllium was used to infer bedrock surface exposure ages, which are interpreted as episodes of active fluvial erosion. Resulting exposure ages span from 3 to 6 ka, suggesting that strath terraces were exposed relatively recently, and incision was dominant through most of the Holocene.
In combination, our results support precipitation-driven fluvial dynamics, which regulates the balance between stream power and sediment supply. On a larger spatial scale, however, fluvial dynamics are probably not spatially homogeneous as aggradation could have been taking place in adjacent catchments while incision dominated in the study area.
Millennial-scale variations in monsoon intensity play a fundamen- tal role in modulating sediment supply to the foreland of the Hi- malaya Bookhagen et al.
Given that the oldest dated terraces above the current river level in the hanging wall of the Bardibas thrust T5 of Bollinger et al.
Although this effect has been well studied at different locations along the Himalayan range front for fill terraces and terraces incising older Quaternary features such as alluvial fans, e.
Lave and Avouac, Erosional Hotspot - Himalayan Foothills The famous Himalayan Mountains are gifted with shining glaciers and continuous rivers, expressing beauty and elegance. Although the tops of these mountains are glamorous and dazzling, the foothills of these beautiful mountains are a critical erosional hotspot .
Request PDF on ResearchGate | Climatically controlled Late Quaternary terrace staircase development in the fold- and -thrust belt of the Sub Himalaya | The alluviation and incision history of Late. Aug 26, · Erosional Hotspot - Himalayan Foothills.
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38 Views. Answer · Soil Erosion. How can deforestation reduce soil erosion? Alan Willoughby, former Maths Teacher, Earth Scientist, Natural Therapist, () Answered Apr 17, · Author has k answers and k . The Himalayan region and quaternary geological surface of Indian sub-continent had experienced several earthquakes in the recent geological period due to reactivation of existing faults.
Closure of Teethes by clockwise rotation of Africa-India toward Eurasia produced Alpine and Himalayan orogenies ("hotspot") continuing the trend from White Mountain granites to New England Main Central Thrust (foothills suture) and later 2) Main Boundary thrust; Himalayas are formed of these slabs.
May 07, · Himalayan Foothills The famous Himalayan Mountains are gifted with shining glaciers and continuous rivers, expressing beauty and elegance.
Although the tops of these mountains are glamorous and dazzling, the foothills of these beautiful mountains are a critical erosional hotspot on earth.