How do scientists use radiometric dating to determine the age of a fossil

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The dating of fossils was originally done by their placement in a geologic column of rock strata. Because of the Law of Superposition, the deeper the stratum, the older it is in an undisturbed body of rock or sediment. Fossils which were evident in a particular stratum, but missing from other strata were noted as "index" fossils. The presence of these fossils indicated the age of the stratum relative to other layers.

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How do scientists determine the age of fossils?

How do scientists use radiometric dating to determine the age of a fossil

Radiometric Age Dating - Geology (U.S. National Park Service)

The age of fossils can be determined using stratigraphy, biostratigraphy, and radiocarbon dating. Paleontology seeks to map out how life evolved across geologic time. A substantial hurdle is the difficulty of working out fossil ages. There are several different methods for estimating the ages of fossils, including:.

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Radiometric dating

On the Atlantic coast of the U. In Morocco, paleontologists excavated the fossils of a dinosaur that roamed Earth million years ago. How did the researchers determine these ages? When examining remnants from the past, experts use radiometric dating, a versatile technique that involves counting radioactive atoms of certain elements that are still present in a sample. The particular elements studied, as well as the details of the process, depend on the approximate age of the object that scientists hope to date.

These samples are well-known methods used radiometric dating used radiometric dating of daughter isotopes to estimate how do. There is not at 4. My area!

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