Uranium lead dating process
It was based on the idea that no significant source of novel heat energy was affecting the Earth.
He believed this even though he did admit that some heat might be generated by the tidal forces or by chemical action.
From the fragments, scientists calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years."It was not until the 1950s that the age of the universe was finally revised and put safely beyond the age of the Earth, which had at last reached its true age of 4.56 billion years," Lewis said.
"Physicists suddenly gained a new respect for geologists."For the record, the universe is now thought to have debuted, at least in its latest incarnation, about 13.7 billion ago.
This just goes to show that just because independent estimates of age seem to agree with each other doesn’t mean that they’re correct – despite the fact that this particular argument is the very same one used to support the validity of radiometric dating today.
Other factors and basic assumptions must also be considered.
By 1904 physicist Ernest Rutherford showed how this decay process could act as a clock for dating old rocks.
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.
Finally in 1976, it was discovered that the earth is “really” 4.6 billion years oldâ€¦ What happened?
There were indeed powerful and unknown sources of energy fueling the Sun’s energy output.
The same is true of the basis of Kelvin’s estimate of the age of the Earth.
The answer of 25 million years deduced by Kelvin was not received favorably by geologists.