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1. Study questions dates for cataclysms on early Moon, Earth | Astronomy.com
... Supernova showered Earth with radioactive debris . ... Study questions dates for cataclysms on early Moon, Earth . Zircons are used to date some of the earliest and most dramatic cataclysms of the solar system, but a study of zircons from a gigantic meteorite impact in South Africa casts doubt on the methods used to date lunar impacts. ... The story is different on Earth, said zircon expert John Valley from UW-Madison. ... The accuracy of zircon dating affects our view of Earth s early history. ...
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Ссылки http://www.astronomy.com/news/2015/10/study-questions-dates-for-cataclysms-on-early-moon-earth -- 71.3 Кб -- 10.04.2016
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