Half life used radiometric dating
Second, because of the short half-life of C, the radiocarbon method can only date specimens up to about 50,000 years of age.Essentially nothing of evolutionary significance is believed to have occurred in this “short” time frame. 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.
All radiometric dating (with the exception of carbon dating) must be done on igneous rocks (rocks solidified from a molten state such as lava).Finally in 1976, they discovered that the earth is “really” 4.6 billion years old.These dates indicate that for 100 years, the age of the earth doubled every 20 years.These radiometric “clocks” begin keeping time when the molten rock solidifies.Since fossils are rarely found in igneous rocks, one can only date lava flows that are occasionally found between layers of sedimentary rock.