KnowraIridium anomalyLinked fromLinked fromThe 12 pages that link to Iridium anomaly, each with the reason it gives.All 12Broader topic 3Related 9Luis AlvarezBroader topic: This was the distinctive chemical clue that led the Alvarez team to propose an impact.Cretaceous–Paleogene boundaryBroader topic: The global anomaly helped identify an extraterrestrial contribution to the extinction.Luis Walter AlvarezBroader topic: Its global distribution supplied a key clue for the proposed extraterrestrial impact.