Disadvantages of uranium lead dating
One way Young Earth Creationists and other denialists try to discredit radiometric dating is to cite examples radiometric dating techniques providing inaccurate results. Helens, creationists attempted discredit the discipline through dishonest practices.This is frequently because the selected technique is used outside of its appropriate range, for example on very recent lavas. The Institute for Creation Research's RATE project aimed to show scientifically that methods of radiometric dating produced wildly inconsistent and incorrect values.Due to the long half-life of uranium it is not suitable for short time periods, such as most archaeological purposes, but it can date the oldest rocks on earth.A proper radiometric date should read years before present (with 1950 being present) ± range/2 at x standard deviations (Xσ)', but is often reported as a single year or a year range, like 1260–1390 CE (the date for the Shroud of Turin).Through analysis, a bone fragment is determined to contain 13% of its original carbon-14.
The time that it takes for half of a sample to decay is known as the half life of the isotope.Most rocks contain uranium, allowing uranium-lead and similar methods to date them.Other elements used for dating, such as rubidium, occur in some minerals but not others, restricting usefulness.Carbon dating works on organic matter, all of which contains carbon.However it is less useful for dating metal or other inorganic objects.