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Dating the earth with lead

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What are the oldest rocks on Earth, and how did they form? The material that holds the greatest insight into these fundamental questions, because it can contain a record of some of the earliest history of the Earth, is a mineral named zircon. For example, a few grains of zircon found in the early s in a sandstone from western Australia dates back 4. Geology professors Darrell Henry of Louisiana State University and Paul Mueller of the University of Florida are expert practitioners of several techniques that can extract precise age information from zircons. Originally formed by crystallization from a magma or in metamorphic rocks, zircons are so durable and resistant to chemical attack that they rarely go away. They may survive many geologic events, which can be recorded in rings of additional zircon that grow around the original crystal like tree rings.
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Uranium-Lead Dating

Dating the earth with lead
Dating the earth with lead
Dating the earth with lead
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The nitty gritty on radioisotopic dating

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It only takes a minute to sign up. I understand there are a few radio-dating methods to determine the age of the earth, uranium-lead to name one maybe not the best though. What I don't understand is how this relates to the age of the earth. Can't the uranium have been rambling for million years in space before lumping together with other elements to form the earth?
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Creation 101: Radiometric Dating and the Age of the Earth

The radiometric evidence for a 4. The basic theory of radiometric dating is briefly reviewed. Since the estimate for the age of the Earth has been based on the assumption that certain meteorite lead isotope ratios are equivalent to the primordial lead isotope ratios on Earth. In this assumption was shown to be highly questionable. Despite this, the momentum gained in the two decades prior to has made 4.
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Radiometric dating finds Earth is 2. This amazing fact seemed like alchemy to many, but American chemist Bertram Borden Boltwood was intrigued. Boltwood studied this concept of "radioactive series," and found that lead was always present in uranium and thorium ores.
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