TL dating of loess and fossil soils from the last interglacial-glacial cycle

TL dates on fine grains from loess and fossil soils have been obtained using the near ultraviolet emission of feldspars. The results are compared with data obtained previously with a blue filter, which enhances the emission of quartz. The values of equivalent doses calculated around 300 C using the 'regen' method are in good agreement for both filters. For samples less than 50 ka the plateau test is particularly well fulfilled when using the near ultraviolet emission. Further down the section good plateaux were not obtained and the absolute meaning of older TL ages is still under question. In spite of this, the apparent TL ages provide enough evidence to solve particular chronostratigraphic problems, for example, enabling us to distinguish two periods of interglacial soil formation, which have been miscorrelated up to now. (author)