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Alvarez’s Chicxulub Crater Links to Dinosaur Extinction
Alvarez and colleagues argue the Chicxulub crater on the Yucatan Peninsula matches the 65 million year timeline of the Cretaceous extinction. Swisher and team dated rocks from drilling cores using potassium argon methods, strengthening the impact hypothesis though noting it does not yet conclusively prove it.
MENTIONED IN THIS ARTICLE
Alvarez
Luis
Haiti
Mexico
Chicxulub
Yucatan Peninsula
Nature
Carl C. Swisher III
Swisher
Institute of Human Origins
Berkeley
Calif