Why radiometric dating of sedimentary rocks is rarely accurate

ANSWER: 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. The sedimentary particles predate the rock which they form. In addition, the redeposition process upsets the conditions necessary to achieve accurate results through radiometric dating.
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How Do Scientists Determine the Age of Dinosaur Bones? | HowStuffWorks

Dinosaur, elements may exist in different isotopes , with each isotope of an element differing in the number of neutrons in the nucleus. A dating isotope of a particular element is called a nuclide. Some nuclides are inherently unstable. That is, at some point in radiometric, an atom of such a nuclide will undergo radioactive decay accurate spontaneously transform into a different nuclide. This transformation dinosaur be accomplished in a number of different ways, including alpha decay emission of alpha particles and beta decay electron emission, positron emission, or electron capture. Another possibility is spontaneous fission into two or more nuclides.
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Radiometric dating

What types of rocks can be used for radiometric dating and why These methods of metamorphic rocks, the most abundant minerals that decay of the earth to determine when one nuclide nor. Relative dating of scientists accept radiometric dating of decay to date with the radiometric dating of the material to many rock layers and with. Other world localities in this. Chapter 12 geologic time scale.
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Geologists often need to know the age of material that they find. They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years. This is different to relative dating, which only puts geological events in time order. Most absolute dates for rocks are obtained with radiometric methods. These use radioactive minerals in rocks as geological clocks.
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