The results are therefore highly consistent given the analytical uncertainties in any measurement. Dating in geology Going back to the distant past In order to date old geological material, geologists rely on radionuclides whose period half life is between a few hundred of thousand and a few million of years. A Radiometric Dating Resource List Tim Thompson has collected a large set of links to web pages that discuss radiometric dating techniques and the age of the earth controversy. This makes the geological time scale no different from other aspects of scientific study. This evaluation was subsequently invalidated by the discovery of radioactivity in the last years of the 19th century, which was an unaccounted for source of heat in Kelvin's original calculations. The data do not support such an interpretation. The amount of data supporting that interpretation is immense, is derived from many fields and methods not only radiometric datingand a discovery would have to be found that invalidated practically all previous data in order for the interpretation to change greatly.
To find out more, see our Privacy and Cookies policy.
Stratigraphy, sedimentology, and vertebrate paleontology of the Judith River Formation Campanian near Muddy Lake, west-central Saskatchewan. Most of the early attempts were based on rates of deposition, erosion, and other geological processes, which yielded uncertain time estimates, but which clearly indicated Earth history was at least million or more years old. For this type of "relative dating" to work it must be known that the succession of events is unique or at least that duplicate events are recognized -- e. This section is important because it places a limit on the youngest age for a specific ammonite shell -- Baculites reesidei -- which is used as a zonal fossil in western North America. From Wikipedia, the free encyclopedia. The date for the Baculites reesidei zone is at least 0. If an inconsistent data point is found, geologists ask the question: