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

DECCAN VOLCANISM - THE SMOKING GUN?

• Main phase of volcanism ends near KT mass extinction

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  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