Radioactive active dating

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During the 1950s and ’60s, isotopic dating of rocks showed that the crystalline massifs of Precambrian age (from about 4 billion to 541 million years ago) found on opposite sides of the South Atlantic did indeed closely correspond in age and composition, as Wegener had surmised.It is now evident that they originated as a single assemblage of Precambrian continental nuclei...The bombardment of planetary and satellite surfaces by debris left over from...Atomic nuclei of a radioactive element decay spontaneously, producing other elements and isotopes until a stable species is formed.

radioactive active dating-21

The age of a rock, for example, can be determined by measuring...Knowing the rate of decay of one nuclear species (nuclide) into another, scientists can, in principle, use the ratios of decay products as a clock to measure the.....the solar system; for this reason they are often called long-lived radionuclides.Radioisotope dating techniques have shown that this water is many thousands of years old.The use of such water, which is not being recharged under the current climatic regime, is termed groundwater...

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