Relative dating which rock layer formed first key
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Are you looking for a trivia quiz on geological dating? Geology has helped in getting a lot of insight on the past, especially when it comes to artefacts or remains that have been found in excavations over the years. There are different tests that can be administered to find the date a rock or artefact belongs to. This quiz will help refresh your understanding of such techniques and dating rocks.
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Law of superposition
Geologic Time: Relative Time Scale
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RELATIVE TIME SCALE
Relative dating is the science of determining the relative order of past events i. In geology, rock or superficial deposits , fossils and lithologies can be used to correlate one stratigraphic column with another. Prior to the discovery of radiometric dating in the early 20th century, which provided a means of absolute dating , archaeologists and geologists used relative dating to determine ages of materials. Though relative dating can only determine the sequential order in which a series of events occurred, not when they occurred, it remains a useful technique.
Correlation is, as mentioned earlier, the technique of piecing together the informational content of separated outcrops. When information derived from two outcrops is integrated , the time interval they represent is probably greater than that of each alone. This optimistic hope, however, must be tempered by the realization that much of the Precambrian record—older than million years—is missing.
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