Radioactive dating of sedimentary rocks
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This is what archaeologists use to determine the age of human-made artifacts. But carbon dating won't work on dinosaur bones. The half-life of carbon is only 5, years, so carbon dating is only effective on samples that are less than 50, years old. Dinosaur bones, on the other hand, are millions of years old -- some fossils are billions of years old.
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Why is it difficult to date sedimentary rocks using radiometric dating techniques?
Why can't radioactive dating be used to date sedimentary rock
What radioactive atom is commonly used to date living things? Carbon, a naturally occurring isotope of carbon in the atmosphere. After death, a living thing does not take in nutrients from the atmosphere and thus do not take in Carbon, thus the carbon in their body start to diminish at a predictable rate. By measuring the amount of carbon left in a… dead matter, the time since death can be determined. Note that this method is only accurate up to 60, years old.
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Because the elements used for dating need to be re-set by volcanism. 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.
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.
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