The answer of 25 million years deduced by Kelvin was not received favorably by geologists.
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.
However, before this time some very popular indirect methods were available.
For example, Lord Kelvin had estimated the ages of both the Earth and the Sun based on cooling rates.
Many of these basalts have been analyzed isotopically and found to have crystallization ages of 3.9 to 4 billion years.Most systems promoted by Evolutionists involve radioactivity.Various radioactive elements are involved, including Carbon-14, Uranium-238, Thorium-232, and Potassium-40.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?Melting at depth produced liquids that were gravitationally light and thus rose toward the surface and crystallized to form the earliest to develop above upwelling regions.