In 1947, geologists firmly established that the earth was 3.4 billion years old. These dates indicate that for 100 years, the age of the earth doubled every 20 years. As we will see, selected data and unprovable assumptions are a problem with all methods for determining the age of the earth, as well as for dating its fossils and rocks. This is an outrageous case of circular reasoning , and geologists are well aware of the problem. Most people are surprised to learn that there is, in fact, no way to directly determine the age of any fossil or rock.
Radiocarbon dating is actually of little use to evolutionists.
There are several reasons for this. First, no rocks and very few fossils contain measurable quantities of carbon of any kind. Second, because of the short half-life of C14, the radiocarbon method can only date specimens up to about 40,000 years of age. All three of these decay processes have half-lives measured in billions of years. None of these methods can be used on fossils or the sedimentary rock in which fossils are found.