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- W3209456810 abstract "AbstractStudy of Cretaceous (Barremian-Turonian) sediments within the Ariyalur-Pondicherry sub-basin, Cauvery Basin, India mirrors the deposition of fluvial-to-marine transition in a syn-rift setting during the Mesozoic breakup of east Gondwanaland. Within the investigated interval, fluvial Basal Siliciclastic Formation (Upper Gondwana equivalent), overlying the Archean Basement, is succeeded by the marine Dalmiapuram Formation (shallow water) and the Karai Shale Formation (offshore). However, both the marine formations demonstrate the lithocontact with the basement locally. Process-based sedimentary facies analysis identifies nine facies associations categorized in non-marine, shallow marine and deep marine super associations, cumulatively comprising forty sedimentary facies. Facies associations vary in its lithology, primary sedimentary structures, stratal geometry and pattern, paleocurrent direction, as well as in grain size and sorting. The present study reveals the depositional processes ensued across the environmental continuum of mountain front to the ocean. Basal Siliciclastic sediments are restricted in isolated outcrops, along the western margin of the basin. Within this formation, scree-alluvial fan and channel amalgamation are restricted at basin-margin while flood-plain governs in basin-interior. The depositional contextual shifted from continental to marine during Albian on the advent of marine transgression along the eastern passive margin of India. A carbonate (non-rimmed) ramp platform, evolving from homoclinal to distally steepened, shaped the pre-fall shelf by depositing carbonates (Dalmiapuram Formation) while, organic-rich glauconite, phosphate nodule bearing shale (Karai Shale Formation) settled in the basin center. The fluvial-to-marine transition surface records a sequence boundary with the overlying formations reflecting relative sea level change. Limestone to shale conversion is gradational in accord with the pronounced retrogradational trend. However, the basal part of the Dalmiapuram Formation displays a shallowing upward trend (aggradational or progradational). The maximum flooding condition is achieved during the Karai Shale sedimentation at the crowning of transgression.KeywordsContinental-to-marine transitionFaciesSequence stratigraphyRift basin Cretaceous Cauvery basin" @default.
- W3209456810 created "2021-11-08" @default.
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- W3209456810 date "2021-01-01" @default.
- W3209456810 modified "2023-09-27" @default.
- W3209456810 title "Continental-to-Marine Transition in an Ongoing Rift Setting: Barremian-Turonian Sediments of Cauvery Basin, India" @default.
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- W3209456810 doi "https://doi.org/10.1007/978-3-030-71370-6_20" @default.
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