Ways of dating fossils

2 Dating through other social network services such as facebook, google and so on.

There is double dating, where two couples go out somewhere together.

Most often, they measure the amounts of particular radioactive elements—often radiocarbon or potassium—present to determine when a rock was formed, or when an animal or plant died.But when organisms die, they no longer take in any carbon, and the carbon-14 in their bodies begins to decay at a known rate.Scientists use particle accelerators to measure the amount of carbon-14 in biological materials to determine when that organism died." One way of dating fossils relies on their relative positions in the ground.When paleontologists dig deeper in sedimentary rock they are, in effect, looking back in time.

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By looking at the ratio of carbon-12 to carbon-14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of a formerly living thing fairly precisely. So, if you had a fossil that had 10 percent carbon-14 compared to a living sample, then that fossil would be: t = [ ln (0.10) / (-0.693) ] x 5,700 years t = [ (-2.303) / (-0.693) ] x 5,700 years t = [ 3.323 ] x 5,700 years Because the half-life of carbon-14 is 5,700 years, it is only reliable for dating objects up to about 60,000 years old.

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