Accuracy of carbon 14 dating par dating Holbæk
Optical dating, also known as optically stimulated luminescence (OSL), dates the last time mineral sediments (usually quartz or feldspar grains ) were exposed to sunlight.
In the Willandra area it is typically used on quartz sand grains which have been buried and have not been exposed to sunlight since burial.
The average individual's carbon footprint is around three and a half.
This means that humanity is using three and a half earths.
Scientific dating has confirmed the long residence of Aboriginal people in Australia.The measurement is based on an isotope of potassium that radioactively decays at a known rate into argon.K-Ar dating has been used to date lava flows above and below archaeological deposits that contain important hominid fossils in Africa's Olduvai Gorge.Artefacts and other materials can be dated in relative terms by observing which layer of sediments they are found in.This applies the geological principle that under normal circumstances younger layers of sediment will be deposited on top of older layers.
This 'law of superimposition' works in the well-defined layers of the Willandra lunettes, but only dates objects as younger or older than adjacent layers.