Kt boundary dating

The cause for the event has a long history of study and speculation from volcanism to "mammals eating dinosaur eggs".

In most instances, these efforts are flawed because the authors have misunderstood or misrepresented the data they attempt to analyze (for example, Woodmorappe 1979; Morris HM 1985; Morris JD 1994).– Scientists at the University of California, Berkeley, and the Berkeley Geochronology Center have pinpointed the date of the dinosaurs' extinction more precisely than ever thanks to refinements to a common technique for dating rocks and fossils.The argon-argon dating method has been widely used to determine the age of rocks, whether they're thousands or billions of years old.The iridium content was about 30 times higher than that found in typical earth rocks.Iridium is much more common in asteroides and this observation led to the hypothesis of a large meteorite impact as the trigger for the extinctions of the K/T boundary.

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