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U-Pb geochronology of the Deccan Traps and relation to the end-Cretaceous mass extinction
U-Pb zircon geochronology is applied to Deccan rocks and it is shown that the main phase of eruptions initiated ~250,000 years before the Cretaceous-Paleogene boundary and that >1.1 million cubic kilometers of basalt erupted in ~750,000 Years.
U-Pb constraints on pulsed eruption of the Deccan Traps across the end-Cretaceous mass extinction
According to this model, maximum eruption rates occurred before and after the K-Pg extinction, with one such pulse initiating tens of thousands of years prior to both the bolide impact and extinction.
Maastrichtian to Paleocene depositional environment of the Dakhla Formation, Western Desert, Egypt: sedimentology, mineralogy, and integrated micro- and macrofossil biostratigraphies
- A. Tantawy, G. Keller, T. Adatte, W. Stinnesbeck, A. Kassab, P. Schulte
- Geography, Environmental Science
- 1 December 2001
Abstract Integrated sedimentology, mineralogy, geochemistry, and microfossil and macrofossil biostratigraphies of the Maastrichtian–early Paleocene Dakhla Formation of the Western Desert, Egypt,…
Main Deccan volcanism phase ends near the K-T boundary: Evidence from the Krishna-Godavari Basin, SE India
Mixed carbonate-siliciclastic record on the North African margin (Malta)—coupling of weathering processes and mid Miocene climate
We investigated rock outcrops spanning the middle Miocene, global climate-cooling step on the Maltese Islands in order to reconstruct continental weathering rates and terrigenous fluxes, as well as…
Age and paleoenvironment of the Maastrichtian to Paleocene of the Mahajanga Basin, Madagascar: a multidisciplinary approach
Palaeoenvironment of the Cenomanian–Turonian transition at Eastbourne, England
Lithology, stable isotopes and planktic foraminiferal analyses of the Eastbourne section at Gun Gardens (southeast England) reflect sea-level fluctuations and changing climatic and oceanographic…
Yucatán subsurface stratigraphy: Implications and constraints for the Chicxulub impact
Much of the discussion about the effects of an end-of-Cretaceous impact by a large extraterrestrial body in northwestern Yucatan has been done in the context of limited and partly erroneous published…
Chicxulub impact predates the K-T boundary mass extinction.
- G. Keller, T. Adatte, D. Stüben
- Geography, GeologyProceedings of the National Academy of Sciences…
- 16 March 2004
Evidence from a previously uninvestigated core, Yaxcopoil-1, drilled within the Chicxulub crater is reported, indicating that this impact predated the K-T boundary by approximately 300,000 years and thus did not cause the end-Cretaceous mass extinction as commonly believed.
Progressive palaeoenvironmental change during the Late Barremian–Early Aptian as prelude to Oceanic Anoxic Event 1a: Evidence from the Gorgo a Cerbara section (Umbria-Marche basin, central Italy)