A second problem is that for technical reasons, the measurement of argon and the measurement of potassium have to be made on two different samples, because each measurement requires the destruction of the sample.

If the mineral composition of the two sample is different, so that the sample for measuring the potassium is richer or poorer in potassium than the sample used for measuring the argon, then this will be a source of error.

When a rock undergoes metamorphism, some or all of its argon can be outgassed.

If all the argon was lost, this would reset the K-Ar clock to zero, and dating the rock would give us the time of metamorphism; and if we recognized the rock as metamorphic this would actually be quite useful.

Radioactive dating refers to the process of measuring the age of an object using the amount of a given radioactive material it contains.

Relative dating, meanwhile, measures the order of past events, without determining their absolute age.

The radioactive dating relies on spontaneous decomposition into other element. I think it's Radioactive dating, I've been reading for my homework and I can't seem to find carbon dating anywhere in the chapter which I've reread about 3 times so I'm going to assume its radioactive because relative dating isâ€¦ Sedimentary rock can't be dated using radioactive dating because it is composed of sediment, which is actually small pieces of different rocks.

To date it, you have to use radioactive dating on the surrounding rocks.

Geologist determine the age of rocks using radioactive dating.The attraction of the method lies in the fact that one of the daughter elements is argon which is an inert gas.This means that the geologist can plausibly assume that all argon gas escapes from the molten magma while it is still liquid.K has a half-life of 1.248 billion years, which makes it eminently suitable for dating rocks.Potassium is chemically incorporated into common minerals, notably hornblende, biotite and potassium feldspar, which are component minerals of igneous rocks.

Geologist determine the age of rocks using radioactive dating.

The attraction of the method lies in the fact that one of the daughter elements is argon which is an inert gas.

This means that the geologist can plausibly assume that all argon gas escapes from the molten magma while it is still liquid.

K has a half-life of 1.248 billion years, which makes it eminently suitable for dating rocks.

Potassium is chemically incorporated into common minerals, notably hornblende, biotite and potassium feldspar, which are component minerals of igneous rocks.

The severity of this problem decreases as the accuracy of our instruments increases.