Both the physical geologists and paleontologists could point to evidence that much more time was needed to produce what they saw in the stratigraphic and fossil records.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.
The solar estimate was based on the idea that the energy supply for the solar radioactive flux is gravitational contraction.
The coincidence of the ages of the different fractions of the granite and xenolith samples is discussed in the light of the different suggestions about the age of the Malmesbury sediments.
The conclusion is reached that all pre-granitization history has been eliminated.
It is found that, because of these improvements, the radiogenic argon in small and young samples can be measured with precision.
Analytical data for a group of rocks and mineral separates from the Yellowknife subprovince of the Canadian Shield are presented.Second, the sample is irradiated along with a standard of a known age. A major advantage of the argon-argon method is that the sample can be heated incrementally.This process, known as "step heating", provides additional information on the age of the sample.Diese Alterswerte werden als untere Grenzen interpretiert ; das Granitalter bestätigt die Angabe von 553 Millionen Jahren durch Rubidium-Strontium-Datierung.Die Übereinstimmung im Alter zwischen den verschiedenen Granit- und Xenolithfraktionen wird im Lichte der verschiedenen Hypothesen über das Alter der Malmesbury-Sedimente diskutiert.was published, the earth was "scientifically" determined to be 100 million years old. In 1947, science firmly established that the earth was 3.4 billion years old.