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Why is radiometric dating not accurate for sedimentary rocks

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Can we date sedimentary rocks using radiometric dating techniques? Sedimentary rocks cannot be dated directly using radiometric dating, which is based on the idea that when rocks are in liquid form, their radiometric clock resets. This technique is generally used to date igneous and metamorphic rock, which are rocks that were once melted due to extreme heat and pressure. Radiometric dating determines how long ago the liquid rock solidified into solid rock. Sedimentary rock on the other hand consists of sedimentary particles which were removed and deposited somewhere else by some sort of fluid generally wind and water.
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Why is it difficult to date sedimentary rocks using radiometric dating techniques?

Why is radiometric dating not accurate for sedimentary rocks
Why is radiometric dating not accurate for sedimentary rocks
Why is radiometric dating not accurate for sedimentary rocks
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Sedimentary Rocks

Wegener's continental drift hypothesis stated that all the continents once joined together to form a. Categories You can then infer that the dino must have lived some time between these two age dates. For what purpose do geologists use relative dating. They shake particles at datung angles to their direction of travel d. Radiometric dating is used mostly on minerals of igenous and metamorphic rocks.
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Dating Fossils – How Are Fossils Dated?

Radiometric dating , radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon , in which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay. Together with stratigraphic principles , radiometric dating methods are used in geochronology to establish the geologic time scale. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change.
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Radioactive elements decay at a certain constant rate and this is the basis of radiometric dating. But, the decay elements need to be set, much like you would re-set a stop watch for a runner, to ensure an accurate measurement. When minerals get subducted into the Earth and come back as volcanic magmas or ash, this essential re-sets the radiometric clock back to zero and therefore a reliable age date is possible. Sedimentary rocks may have radioactive elements in them, but they have been re-worked from other rocks, so essentially, there radiometric clock has not been re-set back to zero.
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