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Dyke-controlled chute canyon at Mendha on River Par, western India


Affiliations
1 Department of Geography, RNC Arts, JDB Commerce and NSC Science College, Nashik 422 101, India
2 Department of Geography, HPT Arts and RYK Science College, Nashik 422 005, India
3 Department of Earth Sciences, Indian Institute of Science Education and Research, Kolkata 741 246, India
 

Chute channels in rivers flowing on bedrock are uncommon and shaped under limited range of fluvial conditions. This study presents a mechanism of initiation and further development of a chute canyon in the Deccan Trap bedrock along the course of River Par in western India. Based on field evidences, OSL dating, hydraulics and resistivity of the dykes, we hypothesize that the morphology of the canyon is a result of interplay between flood-evoked excavation of a dyke by head-cut migration of gullies from the downstream end of the forming chute and downstream extension by undercutting process. Intermittent slope failure and plucking have contributed to the widening and deepening of the chute canyon.

Keywords

Bedrock, chute channel, dyke, meandering rivers, optically stimulated luminescence dating.
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  • Dyke-controlled chute canyon at Mendha on River Par, western India

Abstract Views: 362  |  PDF Views: 112

Authors

A. D. Patil
Department of Geography, RNC Arts, JDB Commerce and NSC Science College, Nashik 422 101, India
P. S. Hire
Department of Geography, HPT Arts and RYK Science College, Nashik 422 005, India
M. K. Jaiswal
Department of Earth Sciences, Indian Institute of Science Education and Research, Kolkata 741 246, India
G. W. Bramhankar
Department of Geography, HPT Arts and RYK Science College, Nashik 422 005, India
K. Goswami
Department of Earth Sciences, Indian Institute of Science Education and Research, Kolkata 741 246, India

Abstract


Chute channels in rivers flowing on bedrock are uncommon and shaped under limited range of fluvial conditions. This study presents a mechanism of initiation and further development of a chute canyon in the Deccan Trap bedrock along the course of River Par in western India. Based on field evidences, OSL dating, hydraulics and resistivity of the dykes, we hypothesize that the morphology of the canyon is a result of interplay between flood-evoked excavation of a dyke by head-cut migration of gullies from the downstream end of the forming chute and downstream extension by undercutting process. Intermittent slope failure and plucking have contributed to the widening and deepening of the chute canyon.

Keywords


Bedrock, chute channel, dyke, meandering rivers, optically stimulated luminescence dating.

References





DOI: https://doi.org/10.18520/cs%2Fv120%2Fi9%2F1507-1513