Radioactive dating in antarctica

[Wipe Out: History's Most Mysterious Mass Extinctions] "We've shown the impact and the mass extinction coincided as much as one can possibly demonstrate with existing dating techniques," researcher Paul Renne, a geochronologist and director of the Berkeley Geochronology Center in California, told Live Science.

Timing of an impact New findings using high-precision radiometric dating analysis of debris kicked up by the impact now suggest the K-T event and the Chicxulub collision happened no more than 33,000 years apart.In radiometric dating, scientists estimate the ages of samples based on the relative proportions of specific radioactive materials within them.Artist’s impression of a 6-mile-wide asteroid striking the Earth.Scientists now have fresh evidence that such a cosmic impact ended the age of dinosaurs near what is now the town of Chixculub in Mexico.The idea that a cosmic impact ended the age of dinosaurs in what is now Mexico now has fresh new support, researchers say.

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