How it all lines up so far: Rock dating of Chicxulub impact (left), recently published information on terrestrial and marine extinctions (middle), and recent dates for Deccan lavas. Vertical ‘smear’ of dates depicts 1 sigma uncertainties including from systematic sources from published dates. **the timing of the climate warming in Antarctic waters and extinction events is probably much less certain since it relies in part on uncertain end-Cretaceous magnetostratigraphy. Ar/Ar = Argon/Argon radiometric dates, U-Pb = Uranium-Lead radiometric dates. Boltysh impact shown at 2-5,000 years before Chicxulub based on Jolley et al (2010). Wyoming and Haiti dates for impact traces from Renne et al (2013). Denver data from Clyde et al (2016). Montana data from Sprain et al (2015) Antarctic data from Petersen et al (2016), Deccan data from Renne et al (2015) and Schoene et al (2015).