Start Thermoluminescence dating range

Thermoluminescence dating range

This site contains ‘securely stratified’ artefacts in a rubble base below the sand deposits dated by the related but different luminescence technique, optically-stimulated luminescence (OSL) (Jones 1993; 114; Roberts et al. This latter date is below both the rubble layer and the lowest artefacts, while the date of 53,400 5400 years dates the sands immediately above the rubble layer. Stuiver & Reimer (1993) use this last date as the oldest in their most recent calibration program.

Both chemical alteration and physical translocation of charcoal contributed to the aberrant ages at depth in the deposit.

Based on sediment characteristics and the distribution of quartz, chert, quartzite and quartz crystal’ artefacts, there is no evidence that there has been significant vertical displacement of artefacts relative to the surrounding sand matrix.

Deciding whether these dates are accurate and associated with definite evidence of human activity thus becomes critically important.

Below ∼150 cm none of the radiocarbon ages can be considered to indicate reliably the age of deposition of the sediments.

Prior to this he was the Foundation Professor of the same department.

He has conducted extensive archaeological fieldwork in various parts of Australia and Tasmania and in Papua New Guinea since the mid-1960s.

Layers of rock build one atop another — find a fossil or artifact in one layer, and you can reasonably assume it’s older than anything above it.