Radiocarbon determinations luminescence dating and australian archaeology
However, Spooner’s (1998) alternative interpretation of data from this site and Roberts et al.’s (1998) new ‘single-grain’ optically stimulated luminescence (OSL) dates suggest an initial occupation date of less than 10,000 years BP. Luminescence dating of sediments: new light on the human colonisation of Australia. The younger figure conforms with middle range theory (Flood 1995) and the conventional understanding of the Indigenous colonisation of Australia (e.g. The Holocene OSL date is disputed by Price (1998), the TL expert who dated the original samples, owing to OSL sampling procedures and the interpretation of a single selected grain, the statistics used in OSL, and the apparent reliability and consistency of TL. 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.To determine the year age (absolute age) of an object, a number of chemical and radioactive techniques can be used.It is situated in Deaf Adder Gorge in the southern part of Kakadu National Park, in an area called Nauwalabila by the local Aboriginal People. It had previously been called the Linder Site after a local explorer.
This sloping sandstone slab covers a black, sandy floor on which were found stone tools and spear points.
Jinmium’s TL was based on analysis of 28 aliquots for each sample removed from the ground; an aliquot comprised 2,900 quartz grains (Fullagar et al. However, there are problems involved with using TL to determine age for sediments in sandstone rockshelters. Monday viewpoint: Dating the past from 100,000 years to 10,000 years.
This paper will discuss how some of these problems may have biased the original TL dates. (190) recognise the possibility that some of the samples at Jinmium may have been contaminated.
Like other recognized megafaunal extinctions world wide, however, the real reason for the extinctions is still in question.
The archaeological evidence from Australia has been used in the past to support two broad-based theories of human evolution: the Out of Africa hypothesis and Multiregional hypothesis.