Tectonic controls on the morphodynamics of the Brahmaputra River system in the upper Assam valley, India

Lahiri, Siddhartha Kumar; Sinha, Rajiv

doi:10.1016/j.geomorph.2012.04.012

Cited by 89 publications

(51 citation statements)

References 23 publications

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“…The DFS on the two sides of this basin display different form (Sarma, 2005;Lahiri and Sinha, 2012). 311…”

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

“…The rivers on 313 these tributary DFS display sinuosities ranging between 1.37 and 2.06 (Lahiri and Sinha, 2012) with river 314 morphology commonly displaying classic meanderbelt form with alternating point bars and common 315 neck cut off avulsions, indicated by the presence of oxbow lakes (Fig. 10).…”

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

“…These rivers display sinuosity ranges between 1.2 and 2.0, with 320 paleochannels on the DFS surface displaying generally lower sinuosities than their modern counterparts 321 (Lahiri and Sinha, 2012). Avulsive shifts on these DFS currently tend to be westward in response to local 322 subsidence (Lahiri and Sinha, 2012). 323…”

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

“…1.05 (Lahiri and Sinha, 2012). Much of the channel belt evolution is controlled by local tectonic features 330 through local regions of higher subsidence or faulting (Lahiri, 1996;Lahiri and Sinha, 2012).…”

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

“…Much of the channel belt evolution is controlled by local tectonic features 330 through local regions of higher subsidence or faulting (Lahiri, 1996;Lahiri and Sinha, 2012). The bed 331 material and bar deposits of the Brahmaputra River typically range in grain size between silt and fine 332 sand with some coarse sand (Goswami, 1985;Sarma, 2005).…”

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

See 4 more Smart Citations

Fluvial geomorphic elements in modern sedimentary basins and their potential preservation in the rock record: A review

et al. 2015

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“…The DFS on the two sides of this basin display different form (Sarma, 2005;Lahiri and Sinha, 2012). 311…”

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

Section: Features Of Foreland Basins: 221mentioning

confidence: 99%

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Modern and ancient amalgamated sandy meander‐belt deposits: recognition and controls on development

Hartley

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Weissmann

et al. 2018

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Late Quaternary drainage reorganization assisted by surface faulting: The example of the Katrol Hill Fault zone, Kachchh, western India

Maurya

Tiwari

Shaikh

et al. 2021

Earth Surf Processes Landf

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Drainage reorganization on restricted temporal and spatial scales is poorly‐documented. We attempt to decode the relatively complicated mechanism of drainage realignment involving two small rivers that show structurally controlled, highly anomalous channel networks. We provide geomorphic and shallow subsurface evidence using ground‐penetrating radar (GPR) for the presence of a buried paleo‐valley flowing northward through the wind gap and surface faulting along the range bounding Katrol Hill Fault (KHF) which correlates with the previously known three surface faulting events in last ~30 ka bp. Most of the present river channels and the KHF zone are occupied by aeolian miliolite (local name) which is stratigraphic and lithologic equivalent of the Late Quaternary carbonate rich aeolianite deposits occurring in several parts of the globe. The history of drainage evolution in the study area comprises pre‐miliolite, syn‐miliolite and post‐miliolite phases. Geomorphic evidences show that the paleo‐Gangeshwar River flowed north through the wind gap and paleo‐valley, while the short paleo‐Gunawari occupied the saddle zone to the east of Ler dome prior to and during the phase of miliolite deposition which ended by ~40 ka bp. Southward tilting of the Katrol Hill Range (KHR) due to surface faulting cut off the catchment of the paleo‐Gangeshwar River. The abandoned catchment stream extended its channel eastward along the strike through top‐down process while the paleo‐Gunawari River extended its course westward by headward erosion (bottom‐up process). As the channels advanced towards each other they joined to produce the “S”‐shaped bend which formed the capture point. We conclude that multiple surface faulting events along the KHF in the last ~30 ka bp, resulted in uplift and tilting of the KHR which caused drainage realignment by river diversion, beheading and river capture. Our study shows that the complexity of drainage reorganization processes is more explicit on shorter rather than longer timescales.

show abstract

Tectonic controls on the morphodynamics of the Brahmaputra River system in the upper Assam valley, India

Cited by 89 publications

References 23 publications

Fluvial geomorphic elements in modern sedimentary basins and their potential preservation in the rock record: A review

Fluvial geomorphic elements in modern sedimentary basins and their potential preservation in the rock record: A review

Modern and ancient amalgamated sandy meander‐belt deposits: recognition and controls on development

Late Quaternary drainage reorganization assisted by surface faulting: The example of the Katrol Hill Fault zone, Kachchh, western India

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