What is examined to do relative dating

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Melissa graduated from NC State University with a Bachelor's Degree in geology in and currently works as a lab technician. Figuring out the geologic history of an area seems like a daunting task, but there are several strategies that geologists use to figure out which rocks are older than other rocks, and what geologic processes occurred in a particular order. Geologists can numerically date certain rocks by using the radioactive decay of elements trapped in rocks or minerals to figure out their exact age. However, these radioactive isotopes aren't always present in a rock, so geologists must use context clues to build a calendar called a geologic timescale of when each rock layer in a formation was created. Relative dating uses a series of 5 principles listed in the following paragraphs that help geologists compare the ages of different layers of rock and create a geologic timescale for an area.
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So far I have read that Chronometric shows an actual age in years for a defined piece of material or is ABSOLUTE, whereas relative is usually just comparing one age of something to another, without attaching a date to it. I am hoping someone could provide a couple of examples of Chronometric Vs relative dating technologies so I can grasp this further.. Say you find 3 pots buried in the soil, one at 3 feet, one at 6 and one at 9. You know that the pot at 3 feet is newer than the other two and the one at 9 is the oldest. You can't tell the actual age of the pots, but you can put them on a timeline relative to each other.
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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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Asked by Wiki User. Layers of the sediment. Sediment is a type of rock composed of layers dating back to thousands of years.
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