Dating With Fossils

332 Words2 Pages
Dating with fossils Fossils usually consist of shell and bones or living organisms that have been preserved in sedimentary rocks. Occasionally soft parts such as leaves or feathers are also preserved. Finally paleontologists consider as fossil also the traces or imprints left behind by different organisms as they tread on the soft sediments or burrowed through it. A lot of fossils can be dated using radiometric techniques, additionally the discipline of paleostratigraphy allows scientists to infer the geological period a sedimentary rock was deposited by determining the fossil species present in the layers. Evolution and extinction Evolution is the process whereby the genetic makeup of species changes over time, giving rise to new species.

More about Dating With Fossils

Open Document