Neoproterozoic tsunamiite : upper Bhander sandstone, central India

Show simple item record Sarkar, Subir Bose, Pradip K. Eriksson, Patrick George 2011-09-12T07:04:06Z 2011-09-12T07:04:06Z 2011-06
dc.description.abstract This paper addresses a distinctive event bedset encased by coastal erg-margin deposits, at a preferred stratigraphic level near the base of the Neoproterozoic Upper Bhander Sandstone in central India. The bedset is composed of couplets of sandstone beds that exhibit incisive amalgamation although they differ in geometry, structures (at soles, within and at tops of beds), vertical grain-size variation as well as palaeocurrent pattern and direction. The wide extent of the bedset is evident from several exposures spread over a distance of more than 50 km roughly in strike-parallel direction. Flow and depositional dynamics interpreted from the coupled event beds are more consistent with a tsunami origin than alternative palaeogeography-compatible models of climate-induced storm, flash flood or accentuated tide deposits. A palaeotsunamiite model is thus discussed, with separate incoming and outgoing components. Considering the overall depositional setting to be an epeiric sea coast in an intracratonic sag basin, the relevant bedset is inferred to reflect the record of a teletsunamiite; it would also be one of the very few Precambrian tsunamiites known so far. Exceptional preservation of this possible tsunamiite was facilitated by sheltered deposition behind the backshore zone and the berm, as well as by rapid burial by wind-deflated sands and advancing aeolian dunes. en
dc.description.sponsorship SS acknowledges funding from the Council of Scientific and Industrial Research (CSIR), Govt. of India and CAS (Phase V). The authors are indebted to Brian Pratt and two other anonymous reviewers for their suggestions to improve the manuscript to an appreciable extent. The Department of Geological Sciences, Jadavpur University provided infrastructural facilities to SS and PKB. PGE acknowledges funding from the National Research Foundation, South Africa and the University of Pretoria. en_US
dc.description.uri en_US
dc.identifier.citation Sarkar, S, Bose, PK & Eriksson, PG 2011, 'Neoproterozoic tsunamiite : upper Bhander sandstone, central India', Sedimentary Geology, vol. 238, vol. 1-2, pp. 181-190. en
dc.identifier.issn 0037-0738 (print)
dc.identifier.issn 1879-0968 (online)
dc.identifier.other 10.1016/j.sedgeo.2011.04.012
dc.language.iso en en_US
dc.publisher Elsevier BV en_US
dc.rights © 2011 Elsevier B.V. All rights reserved. en
dc.subject Palaeotsunamiite en
dc.subject Run-up product en
dc.subject Draw-down product en
dc.subject Flow dynamics en
dc.subject Upper Bhander Sandstone en
dc.subject Intracratonic sag en
dc.subject Bedsets en
dc.subject Coastal deposits en
dc.title Neoproterozoic tsunamiite : upper Bhander sandstone, central India en
dc.type Postprint Article en

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