Imprints of late quaternary climatic and sea level changes on East and South Indian coast

Banerjee, P. K.

doi:10.1007/bf01204393

Cited by 22 publications

(5 citation statements)

References 6 publications

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“…BP, there is no clear evidence of an abrupt climatic change in Indo-Asian monsoon proxies studied (Berkelhammer et al, 2012; Contreras-Rosales et al, 2014; Dykoski et al, 2005; Sarkar et al, 2015; Zorzi et al, 2015) that could suggest a direct impact of climate on turbidite activity and sediment delivery (Figure 2). Yet, this period is characterized by a rapid sea-level rise, described in Bangladesh and India (Banerjee, 1993; Hait and Behling, 2008; Islam and Tooley, 1999; Umitsu, 1993). Hait and Behling (2008) described a flooding of mangrove around 9.2 ka cal.…”

Section: Discussionmentioning

confidence: 99%

“…The Ganges-Brahmaputra major sediment load was able to keep pace with rapid sea-level rise during this period (Goodbred and Kuehl, 2000b). In the Bay of Bengal, this rapid sea-level rise is recorded in Bangladesh and India, and it is reconstructed using bore holes (Umitsu, 1993), coastal ironstone; channel fill facies (Banerjee, 1993); pollen analysis (Hait and Behling, 2008; Islam and Tooley, (Sarkar et al, 2015), δD record from sediment core SO188-342KL (Contreras-Rosales et al, 2014), percentage of coastal forest pollen record from sediment core NGHP-01-16 (Zorzi et al, 2015), Dongge cave speleothem δ18O record (Dykoski et al, 2005), and insolation curve at 20°N. 1999); and pollen, diatom, and facies analysis (Rashid et al, 2013).…”

Section: Introductionmentioning

confidence: 97%

“…The Ganges-Brahmaputra major sediment load was able to keep pace with rapid sea-level rise during this period (Goodbred and Kuehl, 2000b). In the Bay of Bengal, this rapid sea-level rise is recorded in Bangladesh and India, and it is reconstructed using bore holes (Umitsu, 1993), coastal ironstone; channel fill facies (Banerjee, 1993); pollen analysis (Hait and Behling, 2008; Islam and Tooley, 1999); and pollen, diatom, and facies analysis (Rashid et al, 2013). Islam and Tooley (1999) highlighted a first transgression phase between 9.2 and 6.8 ka BP which is also recorded more recently with a flooding of mangroves at this time in Bangladesh (Hait and Behling, 2008).…”

Section: Introductionmentioning

confidence: 99%

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The Bengal fan: External controls on the Holocene Active Channel turbidite activity

et al. 2016

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The eastern levee of the Active Channel in the Bengal fan has been investigated in order to better understand the history of turbidite activity in this channel during the Holocene in the context of Ganges-Brahmaputra ‘source-to-sink’ system. A robust 14C-based chronostratigraphy provides high temporal resolution for reconstructing sediment accumulation history on the eastern levee of the Active Channel. Integration of this study with previous work in the area suggests that the Bengal fan has remained continually connected with the Ganges-Brahmaputra fluvial system through the Holocene, feeding through the main canyon, the Swatch of No Ground (SoNG). An intense turbidite activity occurred during a transgressive wet period from 14.5 to 9.2 ka cal. BP, followed by an abrupt shift in sedimentation at 9.2 ka cal. BP, probably due to the high sea level leading to a partial disconnection between massive river discharges and the deep turbidite system. During the last 9.2 ka cal. BP, turbidite activity is still present but irregular, likely modulated by a combination of various forcings such as monsoon variability and river migration. In total, three phases are distinguishable during this period: 9.2–5.5, 5.5–4, and 4 ka cal. BP to modern, according to the turbidite record. Unexpectedly, the Indo-Asian monsoon does not appear to be the only predominant forcing on the establishment of the Bengal fan during the Holocene because of the combination of different forcings directly affecting transfers between the Ganges-Brahmaputra and the Bengal fan as well as river migrations, delta construction, and potentially anthropogenic impact.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

“…The Ganges-Brahmaputra major sediment load was able to keep pace with rapid sea-level rise during this period (Goodbred and Kuehl, 2000b). In the Bay of Bengal, this rapid sea-level rise is recorded in Bangladesh and India, and it is reconstructed using bore holes (Umitsu, 1993), coastal ironstone; channel fill facies (Banerjee, 1993); pollen analysis (Hait and Behling, 2008; Islam and Tooley, 1999); and pollen, diatom, and facies analysis (Rashid et al, 2013). Islam and Tooley (1999) highlighted a first transgression phase between 9.2 and 6.8 ka BP which is also recorded more recently with a flooding of mangroves at this time in Bangladesh (Hait and Behling, 2008).…”

Section: Introductionmentioning

confidence: 99%

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The Bengal fan: External controls on the Holocene Active Channel turbidite activity

et al. 2016

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“…(2006) and Maher and Hu (2006). According to Banerjee (1993, 2000), the maximum sea level along the Indian east coast was reached ≈6000 cal years bp . According to Nageswara Rao and Sadakata (1993), the Chilika Lake was part of the open sea at that time.…”

Section: Discussionmentioning

confidence: 99%

Assessment of element distribution and heavy metal contamination in Chilika Lake sediments (India)

et al. 2009

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Chilika Lake is situated on the Indian east coast. It is one of the largest lagoons in the world, with a unique assemblage of marine, brackish water and freshwater species. Due to the opening of new connections to the sea in the years 2000 and 2008, an environmental change is expected in the lagoon. The study gives an assessment of sediment contamination by heavy metals on the verge of this change (sampling campaign in 2000). Sediment samples from two surface levels (0-5 and 30-35 cm), and from depth profiles, were analysed for mineralogical composition, main and trace element concentrations, and element bonding forms. Background concentrations from a depth profile were also examined. The profile spans a time of 13 500 years. Age determinations by radiocarbon dating and the 137 Cs-and 210 Pb-method were carried out. The composition of the surface sediments is generally uniform. The heavy metals exhibit slightly decreasing concentrations from NE to SW, thus indicating the supply of contaminants from the Mahanadi River. The anthropogenic portion of the heavy metal supply is mainly bound to Fe-oxide-hydroxides. Phosphorus is enriched in the sediments of the southern lake sector. Changes in element concentrations in the last 13 500 years have occurred mainly in two steps. The long-term variations exceed the anthropogenic changes caused by the Mahanadi River inputs. The very sensitive response of coastal area fabrics on climate changes also causes fast geogenic changes in element concentrations in sediments (similar grain sizes). This prevents the use of element concentrations from deep sediment horizons to define contaminations in those areas.

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“…Along the Indian coast, limited studies suggest significant changes in the magnitude of the Holocene sea level (Banerjee, 1993(Banerjee, , 2000Pant and Juyal, 1993;Juyal et al, 1995;Kunte and Wagle, 2005;Bhatt and Bhonde, 2006;Banerji et al, 2015) (Fig. 1A).…”

Section: Introductionmentioning

confidence: 99%

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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Imprints of late quaternary climatic and sea level changes on East and South Indian coast

Cited by 22 publications

References 6 publications

The Bengal fan: External controls on the Holocene Active Channel turbidite activity

The Bengal fan: External controls on the Holocene Active Channel turbidite activity

Assessment of element distribution and heavy metal contamination in Chilika Lake sediments (India)

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

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