Radioactive isotopes used in dating fossils

27 Nov

He would have answered that the Earth was ancient, that there had not been a Noachian flood, and that the species of life had not been fixed over the history of Earth.In short, Genesis was an allegory and not literal history.These cosmogonies were part of the new emphasis of science in seeking rational explanations of the features of the world. This period was marked by a great deal of field geology rather than grand cosmogonies.It became clear that there had been significant changes in the Earth's topography over time and that these changes could neither be accounted for by natural processes operating during the brief nor by the postulated Noachian flood.The amount of the isotope in the object is compared to the amount of the isotope's decay products.The object's approximate age can then be figured out using the known rate of decay of the isotope.

In the case of radiocarbon dating, the half-life of carbon 14 is 5,730 years.Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.Archaeological geology as a science had to precede the proposal of evolution, as an understanding of the immense age of the earth is necessary to understand evolution.I have integrated this web page on human evolution into an electronic text, " Nature's Holism - Holism.Evolution & Ecology " (see its HOME PAGE .) The result is that some areas, such as the glossary are shared.If, in the year AD 1600, you had asked an educated European how old the planet Earth was and to recount its history he would have said that it was about 6000 years old and that its ancient history was given by the biblical account in Genesis.If you asked the same question of an educated European in AD 1900 you would have received a quite different answer.Without the universal acceptance of the principle of evolution, there is no chance for the serious proposal of holism.Scientists now have accurate methods (see below ) for dating fossils.any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it.