CHICXULUB - THE NON-SMOKING GUN Chicxulub Impact Predates KT Mass Extinction in NE Mexico Chicxulub Crater Conclusions - Chicxulub Impact Predates KT by 300 kyr Chicxulub Evidence at Brazos, Texas The KT Transition in Brazil Chicxulub Impact - No Mass Extinction The Great Chicxulub Debate - 2003-2004 Reference The following papers can be downloaded as pdf files: Chicxulub impact predates K-T Boundary: new Evidence from Brazos, Texas (Gerta Keller et al., Earth and Planetary Science Letters, 255 (2007), 339-356) Biotic effects of impacts and volcanism (by Gerta Keller, Earth and Planetary Science Letters 215 (2003) 249-264) The end-cretaceous mass extinction in the marine realm: year 2000 assessment (by Gerta Keller, Planetary and Space Science 49 (2001) 817-830) Multiple impacts across the Cretaceous-Tertiary boundary (by G. Keller et al., Earth-Science Reviews 62 (2003) 327-363) Spherule deposits in Cretaceous-Tertiary boundary sediments in Belize and Guatemala (by G. Keller et al., Journal of the Geological Society, London, Vol. 160, 2003, pp. 783-795) The Non-Smoking Gun (Geological Society London) The Non-Smoking Gun - DEBATE (Geological Society London) Chicxulub impact predates the K-T boundary mass extinction (by G. Keller et al., PNAS, Vol. 101 No. 11, 2004, pp. 3753-3758. More evidence that the Chicxulub impact predates the K/T mass extinction (by G. Keller et al., Meteoritics & Planetary Science 39 (2004) 1127-1144)
	Gerta Keller Princeton University Princeton, NJ, USA email Gerta Keller	Thierry Adatte University of Neuchatel Switzerland email Thierry Adatte			Wolfgang Stinnesbeck University of Karlsruhe Germany email Wolfgang Stinnesbeck	Doris Stueben University of Karlsruhe Germany email Doris Steuben