Radiometric dating of earth
The half-life is the amount of time it takes for half of the atoms to decay.
This is based upon the spontaneous breakdown or decay of atomic nuclei.The element is defined by the number of protons present in the nucleus.Carbon has six protons and six neutrons, Carbon-12 has six protons and 12 neutrons.Potassium-argon dating can be used on materials such as mica, feldspar, and other minerals.The decay of rubidium-87 into strontium-87 can also be used for dating.Clair Patterson developed the uranium-lead method in 1948.Potassium-argon dating is another kind of radioactive dating. Potassium-containing minerals are tested to find the amount of argon-40 and then to calculate the time that has passed since the mineral cooled to about 300 degrees.Old earth creationists are more accepting of radiometric dating and its findings, but young earth creationists reject the technique. Pennock states that “young-earthers still try to argue that the radioisotope data cannot be trusted, suggesting that rates of decay were not constant but had accelerated at times, thus skewing the data so the earth appears to be much older.” Cotner and Moore write the following: Andrew Snelling of the antievolution organization Answers in Genesis claims that radiometric dating is inaccurate because it contradicts the Bible and because “we now have impeccable evidence that radioactive decay rates were greatly sped up at some point during the past, for example, during the global catastrophic Genesis Flood.” This alleged evidence has never been published in a peer-reviewed scientific journal.Just as there is no evidence for a global flood, so too is there no evidence that rates of radiometric decay have changed significantly over time, nor is there any evidence that the laws of physics change during floods.Fossils are then dated relative to the layers in which they were found.Hurd explains that “[b]iostratigraphic dating rests on the fact that certain extinct ancestor of the modern horse, cow, or elephant always appear in specific locations in the standard geographical column.” Anachronistic fossils have never been found.