Soft-sediment deformation structures in a Permo-carboniferous glacio-marine setting, Talchir Formation, Dudhi Nala, India

Bhattacharya, H. N.; Mukherjee, Amrita

doi:10.1007/s12040-020-1357-5

Cited by 3 publications

(1 citation statement)

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“…Shaking of water-saturated sediments by seismic shocks and factors controlling the physical characteristics of sediments such as porosity, permeability, cohesion generates soft-sediment deformation, and fluid escape structures [14]. Earlier research on SSDS was centered on older sediments, such as Proterozoic Vindhyan sediments, Chaibasa Formation, Cuddapah sediments [15] [16] [17] [18], Mesozoic sediments [19] [20], and Paleozoic [21] [22]. However, there is meager work on SSDS of Quaternary sediments of the Himalayan region, such as Karewas [23], and almost nil in the Ganga basin.…”

Section: Introductionmentioning

confidence: 99%

Soft Sediment Deformation Structures in the Sediment Deposits of Ganga River and Its Oxbow Lakes in Parts of Indo-Gangetic Plain: Implications for Quake Proxies and Paleoseismicity Tracking

Ali¹,

Sajid²,

Khan³

2023

IJG

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The Late Quaternary thick sedimentary fills of the Ganga basin predominantly consist of unconsolidated fluvial sandy deposits which are often intercalated with mud. These deposits at various places record the evidence of earthquakes, which occurred in the recent geological past. The evidence is contained and manifested in the form of Soft Sediment Deformation Structures (SSDSs). Saturated sediments/muds/soils are liquefied by earthquake tremors which either generate SSDS or produce structural discordance in the pre-existing sedimentary structures. The present study reports the occurrence of SSDS, e.g. load and associated flame structures, clastic dikes and sill structures, slump structures and sedimentary breccias, etc. from the Ganga River and adjacent oxbow lake sediment deposits. An attempt has been made to establish the origin of soft sediment structures of this region in accordance with its neotectonic history and in turn, identification of seismic structural proxies to delineate paleoseismic events in this region with futuristic implications. The preservation of soft sediment deformation structures in large numbers with multiple geomorphology and scale, in the river and adjoining lake sediments, is indicative of frequent earthquakes of high magnitude consequent to tectonic activism in the Himalayan region.

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