Chronostratigraphy Geochronology Isotope geochemistry Law of superposition Luminescence dating Samarium—neodymium dating. The dark brown color of most zircon crystals is caused by iron oxide impurities. The second requirement is that assumptions about the genetic relationship between the Earth and meteorites must be made. He supported this argument with lead measurements taken from deep ocean sediment. Chinese Japanese Korean Vietnamese. How old are your grandparents? Acta 10,
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The amount of Pb will remain constant throughout the history of a rock because it is a stable isotope that is not the product of any decay series, thus allowing for the normalization Dalrymple