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Title: K-T transition in Deccan Traps of central India marks major marine Seaway across India
Authors: Keller G.
Adatte T.
Bajpai, Sunil
Mohabey D.M.
Widdowson M.
Khosla A.
Sharma R.
Khosla S.C.
Gertsch B.
Fleitmann D.
Sahni A.
Published in: Earth and Planetary Science Letters
Abstract: 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. © 2009 Elsevier B.V. All rights reserved.
Citation: Earth and Planetary Science Letters (2009), 282(43834): 10-23
Issue Date: 2009
Keywords: central India Seaway
Deccan volcanism
K-T boundary
ISSN: 0012821X
Author Scopus IDs: 7201829659
Author Affiliations: Keller, G., Geosciences, Princeton University, Princeton, NJ 08544, United States
Adatte, T., Geological and Paleontological Institute, University of Lausanne, Anthropole, CH-1015 Lausanne, Switzerland
Bajpai, S., Department of Earth Sciences, Indian Institute of Technology, Roorkee, 247 667 (Uttarakhand), India
Mohabey, D.M., Geological Survey of India, Central Region, Seminary Hills, Nagpur, 440 006, India
Widdowson, M., Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes,MK7, United Kingdom
Khosla, A., Department of Geology, Panjab University, Sector-14, Chandigarh, 160014, India
Sharma, R., Department of Earth Sciences, Indian Institute of Technology, Roorkee, 247 667 (Uttarakhand), India
Khosla, S.C., Department of Geology, Mohanlal Sukhadia University, Udaipur, 310 002, India
Gertsch, B., Geosciences, Princeton University, Princeton, NJ 08544, United States
Fleitmann, D., Institute of Geological Sciences, University of Bern, CH-3012 Bern, Switzerland
Sahni, A., Department of Geology, Panjab University, Sector-14, Chandigarh, 160014, India
Funding Details: We are grateful to the Geological Survey of India for logistical support during fieldwork, to Rimjhim Singh and Krishna Kumar for field assistance, Anachiara Bartolini for permission to use stable isotope data from Rajahmundry, André Villard for expert thin section preparations and Eric Verrecchia for invaluable insights and consultation with paleosol microfacies analyses. This material is based upon work supported by the US National Science Foundation's Continental Dynamics Program, Sedimentary Geology and Paleobiology Program and Office of International Science & Engineering's India Program under NSF Grants EAR-0207407 and EAR-0750664 (to GK); the Swiss National Fund No. 21-67702.02/1 (to TA), CNRS EclipseII program, the Ramanna Fellowship (to SB), Department of Science and Technology (DST), Government of India grants (to SB, AK and SCK), and Council of Scientific and Industrial Research (CSIR) grant (to RS).
Corresponding Author: Keller, G.; Geosciences, Princeton University, Princeton, NJ 08544, United States; email:
Appears in Collections:Journal Publications [ES]

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