Details

Autor(en) / Beteiligte

• Sharma, Shubhra
• Chauhan, Gaurav
• Shukla, Anil Dutt
• Nambiar, Romi
• Bhushan, Ravi
• Desai, Bhawanisingh G.
• Pandey, Shilpa
• Dabhi, Madhavi
• Bhandari, Subhash
• Bhosale, Suraj
• Lakhote, Abhishek
• Juyal, Navin

Titel

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

Ist Teil von

• Quaternary research, 2021-03, Vol.100, p.98-121

Ort / Verlag

New York, USA: Cambridge University Press

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.