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K–T transition in Deccan Traps of central India marks major marine Seaway across India

Keller, G.; Adatte, T.; Bajpai, S.; Mohabey, D. M.; Widdowson, M.; Khosla, A.; Sharma, R; Khosla, S. C.; Gertsch, B.; Fleitmann, D. and Sahni, A. (2009). K–T transition in Deccan Traps of central India marks major marine Seaway across India. Earth and Planetary Science Letters, 282(1-4) pp. 10–23.

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Deccan intertrappean sediments in central India are generally considered as terrestrial deposits of Maastrichtian age, but the Cretaceous–Tertiary (K–T) position is still unknown. Here we report the discovery of the K–T transition, a marine incursion and environmental changes preserved within the intertrappean sediments at Jhilmili, Chhindwara District, Madhya Pradesh. Integrative biostratigraphic, sedimentologic, mineralogic and chemostratigraphic analyses reveal the basal Danian in the intertrappean sediments between lower and upper trap basalts that regionally correspond to C29r and the C29R/C29N transition, respectively. Intertrappean deposition occurred in predominantly terrestrial semi-humid to arid environments. But a short aquatic interval of fresh water ponds and lakes followed by shallow coastal marine conditions with brackish marine ostracods and early Danian zone P1a planktic foraminifera mark this interval very close to the K–T boundary. This marine incursion marks the existence of a nearby seaway, probably extending inland from the west through the Narmada and Tapti rift valleys. The Jhilmili results thus identify the K–T boundary near the end of the main phase of Deccan eruptions and indicate that a major seaway extended at least 800 km across India.

Item Type: Journal Item
Copyright Holders: 2009 Elsevier B.V.
ISSN: 0012-821X
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetUS National Science Foundation [grant numbers EAR-0207407 and EAR-0750664]
Not SetNot SetSwiss National Fund [grant number 21-67702.02/1]
Not SetNot SetCNRS EclipseII Program
Not SetNot SetRamanna Fellowship
Not SetNot SetDepartment of Science and Technology
Not SetNot SetGovernment of India
Not SetNot SetCouncil of Scientific and Industrial Research
Keywords: Deccan volcanism; K–T boundary; central India Seaway
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 16120
Depositing User: Mike Widdowson
Date Deposited: 30 Apr 2009 15:25
Last Modified: 02 May 2018 13:00
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