How are fossils dated using radiometric dating
Second, one must be certain that there were no daughter isotopes present in the beginning.
Third, one must be certain that neither parent nor daughter isotopes have ever been added or removed from the specimen.
In other words, the less of the parent isotope (and the more of the daughter isotope) we measure in a specimen, the older we assume it to be.
Radiocarbon dating is actually of little use to evolutionists. First, no rocks and relatively few fossils contain measurable quantities of carbon of any kind.
Finally in 1976, they discovered that the earth is “really” 4.6 billion years old.
On the other hand, the most widely used method for determining the age of the rock strata is to date them by the “known age” of the fossils they contain. O’Rourke, for example, concedes: The intelligent layman has long suspected circular reasoning in the use of rocks to date fossils and fossils to date rocks.The so-called “absolute” methods of dating (radiometric methods) actually only measure the present ratios of radioactive isotopes and their decay products in suitable specimens—not their age.These measured ratios are then extrapolated to an “age” determination. Much of the controversy between evolutionists and creationists concerns the age of the earth and its fossils.At the time Darwin’s On the Origin of Species was published, the earth was “scientifically” determined to be 100 million years old. In 1947, geologists firmly established that the earth was 3.4 billion years old.
Lava flows from volcanoes on the north rim of the Grand Canyon (which erupted after its formation) show potassium-argon dates a billion years “older” than the most ancient basement rocks at the bottom of the canyon.