Nitrogen dating method
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.
This relatively new technique was developed in order to achieve more accurate dates than those obtained from the potassium-argon method.
Another useful chemical analysis technique involves calculating the amount of nitrogen within a bone.The heat from a volcanic eruption releases all the argon from the molten rock and disperses it into the atmosphere.