what is the principle of absolute age dating

These break down over time in a process scientists call radioactive decay. Rapid melting of the glacier in the summer results in a thick, sandy deposit of sediment. Other types of evidence are needed to establish the absolute age of objects in years. Stratigraphy is the record of these different layers or strata. Third, we observe that the fault A cuts across and displaces rock layers B-F. The principle of superposition states that in an undeformed sequence of sedimentary rocks, each layer of rock is older than the one above it and younger than the one below it Figures 1 and 2. Not sure what you're looking for?

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