What process gives us absolute dating of rocks
These differing rates of decay help make uranium-lead dating one of the most reliable methods of radiometric dating because they provide two different decay clocks.This provides a built-in cross-check to more accurately determine the age of the sample.
Plus, get practice tests, quizzes, and personalized coaching to help you succeed.These two uranium isotopes decay at different rates. The half-life of the uranium-238 to lead-206 is 4.47 billion years.The uranium-235 to lead-207 decay series is marked by a half-life of 704 million years.In fact, this form of dating has been used to date the age of rocks brought back to Earth from the moon.
So, we see there are a number of different methods for dating rocks and other non-living things, but what if our sample is organic in nature?
However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.