Three methods of radiometric dating christian online dating articles
The age of volcanic rocks and ash can be determined by measuring the proportions of argon (in the form of argon-40) and radioactive potassium within them.
Each volcanic eruption produces a new deposit of ash and rock.
During this process the pieces of the atom move apart at high speed, causing damage to the rock or mineral.
This newer method converts a stable form of potassium (potassium-39) into argon-39.
Measuring the proportions of argon-39 and argon-40 within a sample allows the age of the sample to be determined.
Where the rocks are not strongly folded or tilted it is possible to work out the order in which the layers were formed.
The oldest rocks and fossils are at the bottom and the youngest are on top.
Only one sample is required for this method as both the argon-39 and argon-40 can be extracted from the same sample.