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In these studies the isotopic ratios of all the noble gases (He, Ne, Ar, Kr, and Xe) of neutron-irradiated meteorites were measured.
This led to the discovery of There is, of course, one radiometric dating method that appears to overcome the vital “zero date problem”.
Finally in 1976, it was discovered that the earth is “really” 4.6 billion years oldâ€¦ What happened?As one answer to his critics, Kelvin produced a completely independent estimate — this time for the age of the Sun.His result was in close agreement with his estimate of the age of the earth.At first, the use of “key” diagnostic fossils was used to compare different areas of the geologic column.
Although there were attempts to make relative age estimates, no direct dating method was available until the twentieth century.
In his study Rutherford measured the U and He (He is an intermediate decay product of U) contents of uranium-bearing minerals to calculate an age.