These geologic events can cause elements to be gained and lost to the rock.
It’s like cracking the hourglass and having some of the sand leak out, or other sand leak in.
He explores the geology of the area so he can understand the geological history, and where his particular sample fits into the sequence of geological events.
He checks out the ages other geologists have assigned to the different rocks in the region.
The unstable potassium isotope is called the parent while the argon product is called the daughter.
There are a couple of different radioactive forms of uranium that decay into lead.
Like an hour glass, it is said, you simply measure the parent and the daughter elements and you can calculate the age.
However, an hour glass is only useful if we saw it turned over observed that the bottom glass was empty.There are many different radioactive isotopes that are used for radiometric dating.For example, there is a radioactive form of potassium (potassium-40) that decays into argon (argon-40).There is a radioactive form of thorium that also decays into lead.There is an isotope of samarium that decays into neodymium, and one of rubidium that decays into strontium.Apart from the fatal problem of not knowing the initial conditions, there is another problem that is just as deadly.