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- W3201393487 abstract "• Sediments of the Kerala coast are deposited under terrigenous to littoral with diverse energy regime. • Depositional landforms ; estuary , lagoon , and paleo-strandline are carved by sea-level changes. • Stronger monsoon in the early Holocene and a weaker in the Last Glacial Maximum was observed. • Along the Kerala coast, the paleo-shoreline is 9.5 km landward from the present-day shoreline . • A conceptual sediment depositional model is proposed for the evolution of the Kerala coast. Recurrent sea-level changes are reflected in the formation of coastal landforms; estuary, lakes, lagoons and barrier beaches during the late Quaternary period along the Kerala coast, SW India. The sediment core from these landforms was addressed for sediment lithofacies, geochemical parameters and associated foraminiferal assemblages to reconstruct the late Quaternary environment. The textural characteristics of the sediment indicate a shallow marine to lagoon and swampy/marsh environment. A layer of coarse sandy sediment (7–9 m thickness) is overlying the late Pleistocene (40 Kyrs BP) sediment sequence. The sediment was deposited under violent to the calm environment attributing its deposition in diverse energy regimes. This is also corroborated with the micro-textures of quartz grains. The geochemical elemental relationship (Rb vs K 2 O, Ni vs TiO 2 , K 2 O/Na 2 O vs SiO 2 /Al 2 O 3 , discriminant function) is established with paleoweathering, provenance and tectonic setting. An abundant population of Ammonia beccarii, A. tepida, E. discoidale, N. scaphum. A. beccarii in the sediments reveals their high tolerance and adaptability to the changing environment. The multiproxy studies on sediments, support a stronger monsoon in the early Holocene leading to the incursion of high-water levels, increased flow discharge and bottom scouring but, weak monsoon and arid climate prevailed during the Last Glacial Maximum (LGM). A conceptual model is proposed to depict the shoreline evolution and its climate." @default.
- W3201393487 created "2021-09-27" @default.
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- W3201393487 date "2021-12-01" @default.
- W3201393487 modified "2023-09-24" @default.
- W3201393487 title "Reconstruction of the paleoenvironment of the late Quaternary sediments of the Kerala coast, SW India" @default.
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- W3201393487 doi "https://doi.org/10.1016/j.jseaes.2021.104952" @default.
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