However, accurate datingof palaeosols is often problematic.
Based on further information of climate and temperature change after the Little Ice Age (LIA) and human activity in northeastern China, we conclude that the PJ sand dune accumulation was very likely impacted by the immigrants and land reclamation at the end of Qing dynasty.
The fading corrected IR ages are consistent with quartz ages for two sandy soil samples but overestimate those for six sand samples.
Only between 1-2% of the grains yield any luminescence signal, and of these grains only a small proportion have been reset at deposition.
However, by undertaking large numbers of measurements using the single grain OSL system developed by ALRL staff in collaboration with colleagues in Denmark, it has been possible to date such sediments.
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Prices in € represent the retail prices valid in Germany (unless otherwise indicated). Prices do not include postage and handling if applicable. The timing of the formation of extensively distributed sand dunes in the Bohai coastal area and its forcing factors are poorly understood.An NERC project with Neil Glasser (Aberystwyth), Stephan Harrison (Exeter) and Duller has used such single grain measurements to date glacigenic sediments from the margins of the Northern Patagonian Ice Sheet, Chile (Duller 2006).These sediments are extremely challenging for OSL dating.At a number of sites in Chile it has been possible to confirm the validity of these OSL ages by comparison with cosmogenic radionuclide measurements on boulders associated with moraines.Together, the OSL and cosmogenic ages have enabled a detailed record of glacier fluctuations in this key area through the Holocene.We studied young drift-sand deposits in the Weerterbergen area in SE-Netherlands.