As a cross-check, fragments of charcoal from the site were dated using a second method, C14 or radiocarbon dating.
These samples are then dated, and the age information is used to help understand the nature of long term environmental change.
More information: Dr Richard Roberts, La Trobe University, 03 9479 2649 Dr Jon Olley, CSIRO Land & Water, 02 6246 5826 Dr Michael Bird, Australian National University, 02 6249 5171 Dr Ewan Lawson, ANSTO, 02 9717 3111 Margaret Bryant, CSIRO Land & Water, 08 9333 6215 Rhonda Dredge, La Trobe University, 03 9479 1111/1574 EMBARGO: 1AM, Thursday, May 28, 1998 DNA in hair samples collected from Aboriginal people across Australia in the early to mid-1900s has revealed that populations have been continuously present in the same regions for up to 50,000 years ...
The Geography Department at UFV is the home of a luminescence dating laboratory, currently the only one of its kind in western Canada. Olav Lian, this NSERC-funded laboratory serves as a nexus for faculty, undergraduate, graduate, and post-doctoral research in Quaternary geology and geomorphology.
The latest technique of single-grain analysis by OSL is considered far more accurate and reliable.
Standard OSL methods gave a maximum date of 22,000 years for the bottom layer of the Jinmium deposit, and single grain analysis showed that the true age was younger still, no more than 10,000 years for the whole deposit.
There are two types of luminescence dating: thermoluminescence (TL) and optically stimulated luminescence (OSL).