This scheme has been refined to the point that the error margin in dates of rocks can be as low as less than two million years in two-and-a-half billion years. Nuclear Methods of Dating. Radiogenic isotope geology 2nd ed. Numerical and Relative Dating. So this is our original block of our carbon
And let me erase this stuff down here.
Radiometric Dating: Methods, Uses & the Significance of Half-Life
In a sample of rock that does not contain appreciable amounts of Pb, the most abundant isotope of lead, we can assume that lead was not present when the rock was formed. Become a Member Already a member? For example, uranium which decays in a series of steps into lead can be used for establishing the age of rocks and the approximate age of the oldest rocks on earth. It works because we know the fixed radioactive decay rates of uranium, which decays to lead, and for uranium, which decays to lead In addition, the final elemental product is listed after the decal process.