It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The epoch is bracketed by two major events in Earth's history. The end of the epoch was marked by the Paleocene—Eocene thermal maximum PETM , which was a major climatic event wherein about 2,—4, gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Paleocene, the continents of the Northern Hemisphere were still connected via some land bridges ; and South America, Antarctica, and Australia had not completely separated yet.
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Age Of The Earth
Exercise thirteen dating of rocks and geologic events – 30 Day Transformation Team
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The Radiometric Dating Game
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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.