Loess-paleosol sequences (LPS) are an exceptional source of palaeoclimate data constituting an indirect record of changing environmental and climatic conditions that prevailed during loess deposition and early diagenesis. The Zaprężyn LPS (17°11′52″E, 51°14′44″N) is situated in the southern morphological edge of the Trzebnica Hills. This sequence provides an opportunity to reconstruct past climate conditions in this part of SW Poland. In this work, we used two sets of optically stimulated luminescence (OSL) dating from the Gliwice and Bayreuth laboratory to establish a chronological framework for this profile. The results of 14C accelerator mass spectrometry (AMS) dating were also used. The dating results are accompanied by detailed analyses of grain-size distribution and colour. The applied methodology allowed us to distinguish four litho-pedotratigraphic units: modern soil S0, L1LL1 loess unit, L1LL2 loess unit and fossil S1 soil. The OSL dating results indicate an unconformity representing a time interval >30 ka between the L1LL1 and L1LL2 units. This unconformity explains the lack of a L1SS1 soil unit. In Zaprężyn LPS, the presence of the ice wedge pseudomorph in L1LL2 loess unit was recorded. Ice wedge pseudomorph approves the presens the permafrost conditions during the Lower Plenivistulian in Trzebnica Hills.

中文翻译：

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波兰西南部扎普林的冰缘黄土-古土壤层序的年代地层学

黄土-古土壤序列（LPS）是古气候数据的特殊来源，间接记录了黄土沉积和早期成岩作用期间盛行的环境和气候条件的变化。Zaprężyn LPS（17°11′52″E，51°14′44″N）位于Trzebnica山的南部地貌边缘。该序列提供了重建波兰西南部这一地区过去气候条件的机会。在这项工作中，我们使用了来自格利维采和拜罗伊特实验室的两组光刺激发光（OSL）来建立该剖面的时间框架。结果14还使用了 C 加速器质谱（AMS）测年法。测年结果附有粒度分布和颜色的详细分析。应用的方法使我们能够区分四种岩石地层单元：现代土壤 S0、L1LL1 黄土单元、L1LL2 黄土单元和化石 S1 土壤。OSL 测年结果表明不整合面代表 L1LL1 和 L1LL2 单元之间的时间间隔 >30 ka。这种不整合面解释了 L1SS1 土壤单元的缺失。在 Zaprężyn LPS 中，记录了 L1LL2 黄土单元中冰楔假晶的存在。冰楔假形体证实了Trzebnica山下普莱尼维斯图阶时期存在永久冻土条件。