Science and dating


08-Jul-2017 18:09

It is only by correlations that the conditions on different parts of Earth at any particular stage in its history can be deduced.In addition, because sediment deposition is not continuous and much rock material has been removed by erosion, the fossil record from many localities has to be integrated before a complete picture of the evolution of life on Earth can be assembled.

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To achieve this precision, geochronologists have had to develop the ability to isolate certain high-quality minerals that can be shown to have remained closed to migration of the radioactive parent atoms they contain and the daughter atoms formed by radioactive decay over billions of years of geologic time.When rocks are subjected to high temperatures and pressures in mountain roots formed where continents collide, certain datable minerals grow and even regrow to record the timing of such geologic events.When these regions are later exposed in uptilted portions of ancient continents, a history of terrestrial rock-forming events can be deduced.Continents move, carried on huge slabs, or plates, of dense rock about 100 km (62 miles) thick over a low-friction, partially melted zone (the asthenosphere) below.



Get information, facts, and pictures about Dating Techniques at Make research projects and. Dating Methods. World of Earth Science… continue reading »


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Chronological dating, or simply dating, is the process of attributing to an object or event a date. Many disciplines of archaeological science are concerned with dating evidence, but in practice several different dating techniques must be.… continue reading »


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Jul 6, 2018. This week, we're presenting two stories about the science behind dating, ranging from a neuroscientist's attempts to use brain scans and.… continue reading »


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