Chicxulub impact event is Cretaceous/Paleogene boundary in age: New micropaleontological evidence

Analyses of shocked quartz at the global K-P boundary indicate an origin from a single, high-angle, oblique impact at Chicxulub

“…These observations are all consistent with the more widely accepted interpretation that Chicxulub is of K-P age [e.g. 9, 38], and contrasting biostratigraphical interpretations of the micropaleontological data [48].…”

Impact cratering — fundamental process in geoscience and planetary science

“…With regard to the recent controversy that Chicxulub and the K/P impact event could signify the occurrence of two massive impact events in rapid succession, see, e.g., Keller et al (2004). However, this has been rejected most recently by e.g., Arenillas et al (2006) and Schulte et al (2006). The number of confirmed impact structures on Earth, thereafter, has slowly increased further, standing now at about 170, with several others proposed but not unequivocally confirmed yet.…”

Discovery and focused study of the Chicxulub impact crater

“…All of these studies have involved, among other investigations, extensive geophysical surveys and modeling; drilling and coring; laboratory analyses for geochemistry, isotopes, petrology, mineralogy, and physical properties; stratigraphy; and numerical simulations [ Urrutia-Fucugauchi et al, 2011]. Through these methods, studies continue to point to the Chicxulub impact as the leading candidate for the K-Pg mass extinction [Arenillas et al, 2007;Schulte et al, 2010].…”