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Dating a rock involves uranium-lead measurements on many zircons, then assessing the quality of the data.
Some zircons are obviously disturbed and can be ignored, while other cases are harder to judge.
This means that zircon data can tell us not only when a rock formed, but also when significant events occurred during its life.
The oldest zircon yet found dates from 4.4 billion years ago.
If the two people already have the same type of herpes, no problem for dating. What you are referring to is actually called Uranium-Lead dating, a form of radioactive decay dating based on how long it takes various Uranium isotopes to decay to their ultimate stable daughter Lead isotopes. No form of radioactive dating produces exact results.
If the two have different herpes or STD types, you may want to reconsider. By measuring the relative ratios it is possible to calculate the original quantity of Uranium in the sample, then knowing the amount currently present the period of time for the missing amount to decay gives the age of the sample. But results can be gotten that are surprisingly accurate.
carbon dating) to as long as billions of years (e.g. Ask her on a walk and then halfway through the walk be close to her and then just lightly and gently take her hand with one of ur hands and then smile at her and continue the walk.The straight line takes the zircons off the concordia. The disturbing event affects the zircons unequally, stripping all the lead from some, only part of it from others and leaving some untouched.The results from these zircons therefore plot along that straight line, establishing what is called a discordia. If a 1500-million-year-old rock is disturbed to create a discordia, then is undisturbed for another billion years, the whole discordia line will migrate along the curve of the concordia, always pointing to the age of the disturbance.Oh ya this could lead quickly lead to a kiss----or more!
Oh yeah do this about 2 weeks after you start dating.Uranium comes in two common isotopes with atomic weights of 235 and 238 (we'll call them 235U and 238U).