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Radioactive dating problems - poshlittlecloset.com
Kevin Rogers submitted a comment to that article reproduced below, edited to focus on substantive issues , to which Dr Jim Mason replies. Andrew Kulikovsky spoke on one occasion and John Hartnett spoke on 2 occasions. However, we are a house divided. It can be experimentally confirmed that molten Zircon rejects lead. This is highly significant, as it means that the initial conditions are known to a high level of confidence. Jim Mason made no reference to the Concordia line and I could not find any reference to the Concordia line on any articles on the CMI website, even though it is well known e. Jim raised the issue of Helium concentrations in Zircon.
Petrology Tulane University Prof. Stephen A. Nelson Radiometric Dating Prior to the best and most accepted age of the Earth was that proposed by Lord Kelvin based on the amount of time necessary for the Earth to cool to its present temperature from a completely liquid state. Although we now recognize lots of problems with that calculation, the age of 25 my was accepted by most physicists, but considered too short by most geologists. Then, in , radioactivity was discovered.
Radiometric dating , radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon , in which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay. Together with stratigraphic principles , radiometric dating methods are used in geochronology to establish the geologic time scale. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change.