Potassium argon dating is useful for determining the age of Free nawty sex chat
The most common methods of dating fossils and bones rely on the isotopes for dating.
Carbon 12, for example, has six protons and six neutrons while radioactive carbon 14 has six protons and eight neutrons.
Once a hominid fossil has been discovered it can be dated by two main ways: 1) by analyzing the volcanic ash around the fossils; 2) by analyzing the other fossils found around the newly discovered hominid bones. If the ash is older than 1.6 million it can be dated with the potassium-argon method, which dates items by measuring chemical decay.
Each volcanic eruption has a unique "fingerprint" and sometimes they scatter ash over a vast area.
It dates a mineral by measuring the ratio of amount of rubidium and strontium produced by the decay of rubidium.
The potassium-argon method is useful in measuring minerals that around the same age.