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Modern dating methods

Like fossils, the chemical and physical characteristics of rocks, minerals, and organic materials can be used for correlation.

Oxygen isotopes (-O) are widely used in correlation of Quaternary marine sediments.Typically, paleontological information is used in conjunction with other methods of relative or absolute age dating.The most important tools for paleontologists are collections of fossils and paleontological reports (with fossil plates for identification) from other locations in the region or around the world.More modern correlation technologies include use of marine stable isotope records, paleomagnetic dating, tephrachronology, geomorphological methods, sedimentation characteristics, and other geochemical and radiometric methods.Relatively young deposits can be sometimes dated using tree rings, varved-lake sediments, coral growth patterns, and other methods.Micropaleontologists and palynologists work with microscopes or scanning electron microscopes (SEM).Paleontologists frequently work in conjunction with other scientists utilizing any number of other geochronology methods.At different times in Earth's history, the relative abundance of these two isotopes in seawater gradually changed through time (such as during the Permian, the Late Cretaceous, and parts of the Tertiary).A relative age of the original shell can be established by comparing the strontium isotope ratio of the shell material to published data for the time periods where this method is usable.A relative age is the age of a fossil organism, rock, or geologic feature or event defined relative to other organisms, rocks, or features or events rather than in terms of years.Tradition paleontological and biostratigraphic correlation methods are still perhaps the most common relative dating methods used by geologists.

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  1. Relative Dating Methods A relative age is the age of a fossil organism, rock, or geologic feature or event defined relative to other organisms, rocks, or features.

  2. DATING METHODS IN ARCHAEOLOGY Archaeological investigations have no meaning unless the chronological sequence of the events are reconstructed.

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