nn dating ru - Exponential decay radiocarbon dating
If you're seeing this message, it means we're having trouble loading external resources on our website.If you're behind a web filter, please make sure that the domains *.and *.are unblocked.Because of this exponentialdecay, carbon-14 atoms can’t survive millions of years.
What better samples to use than fossils, coals, and limestones, which are supposed to be millions of years old and should have no radiocarbon?
Imagine the surprise when every piece of “ancient” carbon tested has contained measurable quantities of radiocarbon!
It compares the difference between the ratio of two isotopes of carbon in an organic artifact or fossil to the ratio of those two isotopes in the air.
It is believed to be accurate to within about 1% error for plants or animals that died within the last 60,000 years. Find the temperature, to the nearest degree, at 9AM.
Indeed, if all the atoms making up the entire earth were radiocarbon, then after only 1 million years absolutely no carbon-14 atoms should be left!