Radiometric dating geochronology
In dating any object, geologists: When dating an object, a geologist measures some physical property of the object, which is believed to provide evidence regarding its age.All dating methods rely upon assumptions about the past.Radiometric dating is also used to date archaeological materials, including ancient artifacts.Radiometric dating methods are used to establish the geological time scale.All ordinary matter is made up of combinations of chemical elements, each with its own atomic number, indicating the number of protons in the atomic nucleus.Elements exist in different isotopes, with each isotope of an element differing in the number of neutrons in the nucleus.
Thus even when creationists and evolutionists use the same dating methods, they will more often than not achieve radically different results.
Bishop James Ussher, a 17th-century Irish cleric, for example, calculated that creation occurred in 4004 B. There were many other such estimates, but they invariably resulted in an Earth only a few thousand years old.
By the late 18th century, some naturalists had begun to look closely at the ancient rocks of the Earth.
The science of geochronology is the prime tool used in the discipline of chronostratigraphy, which attempts to arrange the sequence and time of deposition of all rocks in a geological region, and eventually, the entire geologic record of the Earth.
The aim of chronostratigraphy is to give a meaningful age date to fossil assemblage intervals and interfaces, as well as to determine the geologic history of the Earth and extraterrestrial bodies.