Strike-slip faults in an intraplate setting and their significance for landform evolution in the Kachchh peninsula, Western India

Bhattacharya, Falguni; Chauhan, Gaurav; Prasad, A. Durga; Patel, Ramesh C.; Thakkar, M. G.

doi:10.1016/j.geomorph.2018.12.006

Cited by 15 publications

(11 citation statements)

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“…For realistic uplift rate estimates, the age and height of the strath above the riverbed should be measured along the river at multiple locations. The regression slope of the plot of incision depth versus the ages obtained at multiple locations will give the time average incision rate (Wegmann and Pazzaglia, 2009; Bhattacharya et al, 2019). Thus, in the present study, we have used the estimates from Bhattacharya et al (2019).…”

Section: Discussionmentioning

confidence: 99%

“…The regression slope of the plot of incision depth versus the ages obtained at multiple locations will give the time average incision rate (Wegmann and Pazzaglia, 2009; Bhattacharya et al, 2019). Thus, in the present study, we have used the estimates from Bhattacharya et al (2019). They suggested the uplift rate for the Wagad upland located in the northeast of Site-1 as 0.06 ± 0.01 mm/yr, and for Pachcham Island located in the proximity of Site-2 as 0.2 ± 0.01 mm/yr.…”

Section: Discussionmentioning

confidence: 99%

“…A similar observation was made by Brückner (1989), suggesting that between 6 and 5 ka, the sea level was ~1 m higher than the present along coastal Saurashtra. Compared to coastal Saurashtra, the Holocene sea-level studies from the tectonically active Kachchh coastline (Bhattacharya et al, 2014, 2019) are limited and also lack robust estimates from a common datum. Gupta (1975) suggested ~4–m-deep water at ~2 ka in the Little Rann.…”

Section: Introductionmentioning

confidence: 99%

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Causes and implications of Mid- to Late Holocene relative sea-level change in the Gulf of Kachchh, western India

et al. 2020

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The relict intertidal deposits from the Kharod River Estuary, Gulf of Kachchh, and the distal end of Kori Creek are used to infer the Mid- to Late Holocene relative sea-level (RSL) change in western India. Employing sedimentology, geochemistry, palynology, ichnology, and optical and radiocarbon dating, the study suggests the dominance of fluvial activity between 16.5 ± 1.6 and 9.9 ± 0.7 ka. After ~7 ka (7.3 ± 0.4, 6.8 ± 0.5 ka), the sea level showed a positive tendency until 4.7 ± 0.2 ka. The tectonically corrected Mid-Holocene RSL change is estimated as 1.45 ± 0.33 m between ~7 and ~5 ka. The study suggests that the Mid-Holocene RSL high was due to the meltwater contribution from the Himalayan cryosphere, with subordinate contribution from glacio-isostatic adjustment and crustal subsidence. The Late Holocene tectonically corrected RSL change at ~1 ka (1.1 ± 0.1 ka and 1045 ± 175 cal yr BP) is estimated as 0.53 ± 0.43 m. This is ascribed to monsoon wind-driven tidal ingression that might have affected the tidal amplitude positively. The study suggests that the Mid-Holocene RSL change did not play a deterministic role in the abandonment of the Harappan coastal settlements.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Causes and implications of Mid- to Late Holocene relative sea-level change in the Gulf of Kachchh, western India

et al. 2020

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“…OSL dating relies upon the principle that the geological luminescence acquired by sediment is erased to a residual value (bleached) during transportation and reacquisition occurs upon burial. Hence, the OSL ages provide the time elapsed since the sediment was last exposed to sunlight (Aitken, 1998;Bhattacharya et al, 2019;Singhvi et al, 2001). The applicability of the OSL technique on the miliolites has already been demonstrated (Sharma et al, 2017).…”

Section: Optically Stimulated Luminescence (Osl)mentioning

confidence: 99%

“…This could be because the Gulf of Kachchh is a closed basin and experiences high turbidity due to the eastward dispersal of sediment plume from the Indus delta (Rao & Rao, 1995). Additionally, compared to Saurashtra, the Kachchh peninsula has significantly less extensive distribution of miliolites which is ascribed to the tectonic instability of the Kachchh peninsula (Bhattacharya et al, 2019;Biswas, 2005) as seen in many tectonically active coastal regions (Brooke, 2001;Clapperton, 1993;Murray-Wallace et al, 1998). Figure 11 summarizes the PM (aeolian)…”

Section: Sea-level and Aeolian Dynamicsmentioning

confidence: 99%

Late‐Quaternary miliolite (biogenic carbonate) deposits and their implications for sea‐level fluctuations and climatic variability

Prasad¹,

Bhattacharya

Chauhan

et al. 2021

Earth Surf Processes Landf

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The western coast of India (Kachchh) has ubiquitous preservations of Quaternary carbonate deposits popularly known as "miliolites". Field-based detail documentation of the nature and distribution of miliolites supported by sedimentology and scanning electron microscopy (SEM) microtextural studies indicates that the miliolites were primarily deposited by wind as aeolinites and are termed "primary miliolites (PM)". These were subsequently fluvially eroded and deposited and such deposits are termed "secondary miliolites (SM)". The PM are dated between 28 ka to 16 ka largely clustering around the Last Glacial Maxima (LGM). In comparison, the fluvially reworked SM occurs as valley-fill deposits and were deposited episodically during 23 ka to 10 ka before present. Climatically, the deposition of PMs suggests enhanced aridity whereas SMs represent episodic strengthening of the Indian Summer Monsoon (ISM). The bedding attitudes of the PMs indicate that they were deposited predominantly by the northeasterly winds whereas the presence of the deflation lag deposits suggests downwind migration of sands during the equilibrium condition (reduced sediment supply). The aeolian parameters (based on the grain size and wind velocities) for PMs indicate high shear velocity ($23 to 48 cm −1 ) and high transport rate (< 0.1 to 0.2 g/cm s). The short average flying distance implies that the biogenic sands were transported in multiple pulses (from coast to inland) at rates varying from $200 m/h to $1 km/h. Comparing our data with related occurrences along the biologically productive coasts in the mid-latitudinal belt indicates that the regional/global aridity during the lowered sea level was responsible for inland occurrences of aeolinites, particularly during the LGM. The strengthened northeast monsoon winds during the LGM was conducive to upwelling and production of biogenic carbonates along the coasts. The subsequent reworking of the aeolinites were mainly the results of local variability in precipitation.

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Late Pleistocene history of aggradation and incision within a bedrock gorge, Narmada River, central India: implications for resurgent tectonic activity and changing climate

Sridhar

Bhattacharya

Vanik

et al. 2022

J Quaternary Science

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Bedrock gorges occurring on the Indian Peninsula are sites of intense erosive activity where thick sequences of fluvial sediments are conspicuously absent. We identified unusually thick and coarse fluvial sequences within the Dhadgaon (DG) gorge in the lower reaches of the Narmada River in central India. Stratigraphic interpretations, sediment character and optically stimulated luminescence (OSL) ages revealed episodic aggradation at ~70 ka and ~28 ka in response to tectonically induced steepening of the upstream channel gradient. Incision of the DG gorge and sedimentation of the alluvial fan downstream was facilitated by a climatically induced decrease in the sediment supply/discharge ratio in addition to the tectonic slope. The final evacuation of sediments from the DG gorge and incision of the Banganga channel occurred during the early Holocene. Collectively, the results show a major influence of tectonics, hillslope processes and lithology on aggradation-incision patterns supported by climatic conditions during the late Quaternary.

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Strike-slip faults in an intraplate setting and their significance for landform evolution in the Kachchh peninsula, Western India

Cited by 15 publications

References 74 publications

Causes and implications of Mid- to Late Holocene relative sea-level change in the Gulf of Kachchh, western India

Causes and implications of Mid- to Late Holocene relative sea-level change in the Gulf of Kachchh, western India

Late‐Quaternary miliolite (biogenic carbonate) deposits and their implications for sea‐level fluctuations and climatic variability

Late Pleistocene history of aggradation and incision within a bedrock gorge, Narmada River, central India: implications for resurgent tectonic activity and changing climate

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