OSL chronostratigraphy for loess deposits from Tyszowce – Poland

Abstract

Abstract:The presented work concerns a loess profile located in Tyszowce, in the eastern part of Poland on the Volyn Upland, close to the Ukrainian border. The investigated loess formation is well preserved and is characterised by clear stratigraphic units providing an opportunity to refine the loess chronostratigraphy in Poland. In the paper, we present luminescence ages of loess from the last glacial cycle in SE Poland (up to about 100 ka) together with seven radiocarbon ages. Twenty-one samples were collected and dated using infrared (post-IR IRSL) and blue light stimulated luminescence dating. Two fractions were used, namely polymineral fine grains (4-11 µm) and medium sized quartz grains (45-63 µm). The obtained luminescence ages show very good agreement of both methods in relation to loess deposits, however for the fossil soil units the post-IR IRSL method yields older ages. Radiocarbon dates also confirm luminescence chronostratigraphy for younger units. Moreover, the luminescence results are supported by detailed analyses of grain size distribution, carbonate content and magnetic susceptibility variations allowing to create a comprehensive picture of chronological evolution of this site.

New approach of clustering of late Pleni-Weichselian loess deposits (L1LL1) in Poland

“…They occur close to the L1SS1 (description of the unit accordint to Ref. [9]) fossil soil distinguished in both profiles correlated with MIS 3 [23,17]. This material had to be strongly transformed as a result of postdeposition processes, as indicated by earlier analyzes [10,18,23,24].…”

“…Its upper part is clearly enriched with material made of a sandy fraction [11,12,19]. Such a large supply of this fraction had to indicate rapid sedimentation from close sources of material [1] as indicated by the obtained dating results [17]. The common database and the algorithm allow even individual samples that were present in a larger structure of another class.…”

“…This study compares the results of the grain size distribution of L1LL1 loess units of three loess-soil sequences: Biały Kościół (Niemcza-Strzelin Hills), Złota (Sandomierz Upland) and Tyszowce (Sokal Plateau-Ridge). These profiles have been repeatedly analyzed, and the results of these analyses are available in many publications (e.g., [11,[14][15][16][17][18][19]). The key element of selection was also the presence of late Pleni-Weichselian loess units and their availability.…”

“…The loess deposits at an active brickyard locally reach a thickness of 20 m. The stratigraphy and the palaeoenvironmental interpretation of neighboring loess-paleosol profiles in Tyszowce have been presented several times in Polish literature [17,19,32,33].…”

Nano-scale analysis of polymineralic surface coatings on aeolian quartz grains with palaeoenvironmental implications

“…The quartz grains se lected rep re sent three well-rec og nized Pol ish loess-palaeosol se quences, those of Bia³y Kooeció³ (Moska et al, 2019), Z³ota (Moska et al, 2018; and Tyszowce (Moska et al, 2017;Skurzyñski et al, 2019), de vel oped in the do main of the north ern Eu ro pean loess belt (do main II sensu Lehmkuhl et al, 2021) but po ten tially under the dif fer ent palaeoenvironmental con di tions (e.g., Maruszczak, 1991): Bia³y Kooeció³ be longs to subdomain IIb (West ern Eu ro pean con ti nen tal subdomain), and the other sections to subdomain IIc (Cen tral Eu ro pean con ti nen tal subdomain; Lehmkuhl et al, 2021). The sam ples from Bia³y Kooeció³ (2.6 m b.g.l.)…”