A number of methods are used, all of which have their advantages, limitations and level of accuracy.
Working out how old archaeological remains are is a vital part of archaeology.
Scientific dating has confirmed the long residence of Aboriginal people in Australia.
This technique can determine ages between a few hundred years to more than 100,000 years.
It has been used at Willandra to date the layers above and below the location of Mungo Lady and Mungo Man , and the layers above and below the footprints horizon.
Four main methods have been used in Willandra archaeology.
This well known method was the first technique that became available for accurate dating of old materials.The method also assumes a 'zeroing' event in the life of the material, when it was either last heated or exposed to sunlight.The cloth has been dated to around 700 AD by radiocarbon dating.The small chapel housing it was built specifically for the cloth by King Alfonso II of Asturias in AD 840; the Arca Santa is an elaborate reliquary chest with a Romanesque metal frontal for the storage of the Sudarium and other relics.The Sudarium is displayed to the public three times a year: Good Friday, the Feast of the Triumph of the Cross on 14 September, and its octave on 21 September.Dates above and below a location provide minimum and maximum age determinations according to the law of superimposition.