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    Absolute chronometric dating techniques

    Age of deposition should not be confused with the date of material enclosed in deposit.

    Cross dating involves comparing similar artifacts from similar sites that may be of similar age.

    In other words, artifacts found in the upper layers of a site will have been deposited more recently than those found in the lower layers.

    Cross-dating of sites, comparing geologic strata at one site with another location and extrapolating the relative ages in that manner, is still an important dating strategy used today, primarily when sites are far too old for absolute dates to have much meaning.

    Though using similar methods, these two techniques differ in certain ways that will be discussed in this article.

    absolute chronometric dating techniques-69absolute chronometric dating techniques-35absolute chronometric dating techniques-18

    These use radioactive minerals in rocks as geological clocks.

    The atoms of some chemical elements have different forms, called isotopes.

    These break down over time in a process scientists call radioactive decay.

    QUESTION: What is the difference between relative and absolute dating techniques?

    ANSWER: In relative dating, something is determined to be older or younger than something else without determining an exact age.

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