Compare relative dating and radioactive dating


21-Aug-2020 16:27

compare relative dating and radioactive dating-8

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See Figure 8.13 Fluorine Dating Response: Fossils are the remains of deceased organisms that have become rock, enabling them to be preserved for thousands or millions of years.Inorganic materials, such as iron and silica slowly and steadily replace the organic materials, like calcium and phosphorus, in the organism.Response: Niels Stensen created the Law of Superposition, which is the foundation for relative dating methods.This law states that the youngest objects or layers are on the top, while the older objects and layers are deeper.It is not about the theory behind radiometric dating methods, it is about their , and it therefore assumes the reader has some familiarity with the technique already (refer to "Other Sources" for more information).As an example of how they are used, radiometric dates from geologically simple, fossiliferous Cretaceous rocks in western North America are compared to the geological time scale.As the earth builds up layers, one on top of the other, the newest and youngest layers are on the surface.

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The replacement of organic materials with inorganic materials is not always complete, as DNA is sometimes preserved within the fossil.Radiometric methods, such as radiocarbon dating and radiopotassium dating utilize the regular radioactive decay of isotopes from one form to another.