Scouring by rafted ice and cryogenic patterned ground preserved in a Palaeoproterozoic equatorial proglacial lagoon succession, eastern India, Nuna supercontinent

dc.contributor.authorRodríguez López, Juan Pedro
dc.contributor.authorVan Vliet-Lanoë, Brigitte
dc.contributor.authorLópez Martínez, Jerónimo
dc.contributor.authorMartín García, Rebeca
dc.date.accessioned2023-06-17T08:55:46Z
dc.date.available2023-06-17T08:55:46Z
dc.date.issued2021-01
dc.description.abstractThe Chaibasa Formation contains the oldest known record of ploughmarks formed by rafted ice preserved on Earth. The Palaeoproterozoic (Orosirian-Rhyacian, 1.86–2.1 Ga) Chaibasa Formation in the Dhalbhumgarh area, eastern India, represents sedimentation in an ice-contact proglacial lagoon affected by iceberg (bits and growlers) calving and lake-ice rafting. Ice scouring, both on muddy and sandy substrates, as well as ice “rosettes” developed as consequence of the ploughing action of floating icebergs that were moved by wind, meltwater floods and tidal currents on soft sediments. Muddy flats surrounding the proglacial lagoon underwent seasonal deep freezing conditions developing cryogenic patterned ground containing reticulate ice, ice veins and sand wedges, suggesting the occurrence of proglacial permafrost areas coeval with Proterozoic glaciers. The central part of the proglacial lagoon was characterized by deposition of glacial varves punctuated by pebble and cobble size angular dropstones accumulated in the basin as ice-rafted debris from floating ice. Evidences provided in this paper reinforced the idea that 1.86–2.1 Ga ago glacial conditions prevailed after the supposed ending of the Huronian glaciation. This paper provides detailed examples that can be used to recognize possible floating/drifted ice scours in other Precambrian successions, as these elements have largely passed undetected, being probably widely reported in the literature as generic soft-sediment deformation structures. Similar soft-sediment deformations from Precambrian clastic depositional systems should be re-evaluated as there is a significant possibility that most of the Precambrian iceberg-related structures had escape notice, as originally suggested Eyles et al. in 1997.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipUNESCO-IGCP
dc.description.sponsorshipIndian Statistical Institute
dc.description.sponsorshipPolar Institute Paul Emile Victor
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/63092
dc.identifier.doi10.1016/j.marpetgeo.2020.104766
dc.identifier.issn0264-8172
dc.identifier.officialurlhttps://www.sciencedirect.com/science/article/pii/S0264817220305493
dc.identifier.urihttps://hdl.handle.net/20.500.14352/7525
dc.issue.number104766
dc.journal.titleMarine and Petroleum Geology
dc.language.isoeng
dc.publisherElsevier
dc.relation.projectIDICPROCI I, II and III
dc.rights.accessRightsrestricted access
dc.subject.cdu551.332"618"
dc.subject.keywordIceberg scouring
dc.subject.keywordIce-rafted debris
dc.subject.keywordPalaeoproterozoic
dc.subject.keywordProglacial
dc.subject.keywordPermafrost
dc.subject.keywordReticulate ice
dc.subject.keywordIndia
dc.subject.ucmGeología estratigráfica
dc.subject.ucmPetrología
dc.subject.unesco2506.19 Estratigrafía
dc.titleScouring by rafted ice and cryogenic patterned ground preserved in a Palaeoproterozoic equatorial proglacial lagoon succession, eastern India, Nuna supercontinent
dc.typejournal article
dc.volume.number123
dspace.entity.typePublication
relation.isAuthorOfPublication86a02762-7c9f-4535-b728-7ee0fdcefce3
relation.isAuthorOfPublicationf9851e8d-8fa0-4223-adf1-eecea6a28483
relation.isAuthorOfPublication.latestForDiscoveryf9851e8d-8fa0-4223-adf1-eecea6a28483
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