Radioactive dating enables geologists to determine
What about radioactive dating? Radioactive dating may be one of the big questions looming in your mind. But the idea of an unimaginably old earth did not come from radioactive dating. It was popular long before radioactivity was discovered see Western Culture and the Age of the Earth. It came from a geologic philosophy, not a scientific measurement. Normal people are not familiar with isotopes, mass spectrographs, rubidium, strontium or half lives.
Radiometric dating - Wikipedia
Radiometric dating , radioactive dating or radioisotope dating is a technique 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.
What does radioactive dating enable geologists to determine?
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.
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