High resolution dating of loess profile from Biały Kościół, south–west Poland

Results of high resolution optically stimulated luminescence (OSL) dating of one of the most complex loess/palaeosol complex in Poland located in the vicinity of the village Biały Kościół (south–west Poland) are presented. Twenty one samples were collected from the 9-m loess profile and dated using the single-aliquot regenerative method applied to coarse grained quartz fraction (90–125 μm). The obtained single-aliquot results were analysed using the central age model. OSL ages are in good agreement with the chronology inferred from the marine oxygen isotope (MOIS) stratigraphy and ages reported for similar lithostratigraphic units for other loess profiles in Europe. However, for the deepest part of the profile underestimation of OSL is observed.

► 21 OSL dates were obtained for one of the most important loess profile in Poland.
► OSL signals from coarse grains quartz extracted from loess were investigated.
► The CAM results were chosen as the most appropriate.
► This is the first detailed luminescence investigation for Polish loess profile.
► Obtained results form a good basis for further OSL studies of Polish loess.