Glacial sedimentation in Northern Gondwana : insights from the Talchir formation, Manendragarh, India

dc.contributor.authorChoudhuri, Adrita
dc.contributor.authorMandal, Sabyasachi
dc.contributor.authorBumby, Adam John
dc.contributor.authorPillai, S. Suresh Kumar
dc.date.accessioned2024-01-17T09:56:11Z
dc.date.available2024-01-17T09:56:11Z
dc.date.issued2023-06
dc.description.abstractAmong the vast swathes of Gondwanan sedimentary rocks in India, exposures of the Lower Permian Talchir Formation at Manendragarh in India are exceptional for their cold marine faunal assemblage and muddy conglomerates of possible glacial origin. They may represent a record of the late Palaeozoic glaciation that affected Gondwana in the Permo-Carboniferous. Although the fossil record is relatively well documented, the sedimentology of this area is not well understood. This paper intends to fill the gap in knowledge regarding palaeogeography and the palaeoenvironmental changes within the basin through space and time. We distinguish conglomerates that are formed by glacial and mass flow processes. The lateral variation in facies associations along a NNE-SSW transect in the study area identifies the depositional basin as an interior sea that formed when the sea spilled over a steep basement ridge during a transgression. The benthic organisms remained confined to the seaward basin margin where they only flourished in the initial stage of basin filling. Locally derived, bioclastic storm beds are limited to the seaward flank of the basin. Alternating phases of glaciation and interglaciation resulted in an interbedded succession of grey shales and interglacial density flow deposits. The channels that fed these density flows are preserved closest to the landward margin of the basin. Co-existence of glacial diamictites and interglacial density flow deposits highlights the climatic changes in this part of Gondwana during the Late Palaeozoic.en_US
dc.description.departmentGeologyen_US
dc.description.librarianhj2024en_US
dc.description.sdgNoneen_US
dc.description.urihttps://www.cambridge.org/geoen_US
dc.identifier.citationChoudhuri, A., Mandal, S., Bumby, A. et al, 2023, 'Glacial sedimentation in Northern Gondwana: insights from the Talchir formation, Manendragarh, India', Geological Magazine, vol. 160, pp. 1228-1240, doi : 10.1017/S0016756823000353.en_US
dc.identifier.issn0016-7568 (print)
dc.identifier.issn1469-5081 (online)
dc.identifier.other10.1017/S0016756823000353
dc.identifier.urihttp://hdl.handle.net/2263/93996
dc.language.isoenen_US
dc.publisherCambridge University Pressen_US
dc.rights© The Author(s), 2023. Published by Cambridge University Press.en_US
dc.subjectPalaeogeographyen_US
dc.subjectGlacial conglomeratesen_US
dc.subjectEarly Permianen_US
dc.subjectDiamictitesen_US
dc.subjectDensity flowsen_US
dc.subjectGlacial sedimentationen_US
dc.subjectNorthern Gondwanaen_US
dc.subjectTalchir formationen_US
dc.subjectIndiaen_US
dc.titleGlacial sedimentation in Northern Gondwana : insights from the Talchir formation, Manendragarh, Indiaen_US
dc.typePostprint Articleen_US

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