Pedology, geochronology, palynology and macrofossils of soil profiles in the Altdarss area, german Baltic Sea coast

A new site with Lateglacial palaeosols covered by 0.8 - 2.4 m thick aeolian sands is presented. The buried soils were subjected to multidisciplinary analyses (pedology, micromorphology, geochronology, dendrology, palynology, macrofossils). The buried soil cover comprises a catena from relatively dry ('Nano'-Podzol, Arenosol) via moist (Histic Gleysol, Gleysol) to wet conditions (Histosol). Dry soils are similar to the so-called Usselo soil, as described from sites in NW Europe and central Poland. The buried soil surface covers ca. 3.4 km**2. Pollen analyses date this surface into the late Aller0d. Due to a possible contamination by younger carbon, radiocarbon dates are too young. OSL dates indicate that the covering by aeolian sands most probably occurred during the Younger Dryas. Botanical analyses enables the reconstruction of a vegetation pattern typical for the late Allerod. Large wooden remains of pine and birch were recorded.

本文报道一处覆盖有0.8~2.4米厚风成砂（aeolian sands）的晚冰期古土壤（Lateglacial palaeosols）新遗址。针对该埋藏土壤开展了多学科分析（multidisciplinary analyses），研究方向涵盖土壤学（pedology）、微形态学（micromorphology）、年代学（geochronology）、树木学（dendrology）、孢粉学（palynology）及大化石（macrofossils）分析。该埋藏土壤序列构成一条土壤链（catena），其发育环境从相对干旱的纳米灰壤（Nano-Podzol）、砂性土（Arenosol），经湿润的腐殖质潜育土（Histic Gleysol）、潜育土（Gleysol），过渡至极端湿润的有机土（Histosol）。其中干旱环境下发育的土壤与欧洲西北部（NW Europe）及波兰中部遗址中记载的乌塞尔洛土壤（Usselo soil）特征相似。该埋藏土壤的分布面积约3.4平方千米。孢粉分析将该地层的年代限定于晚阿勒罗德冰阶。由于可能受到年轻碳的污染，碳十四测年（radiocarbon dates）结果偏年轻。光释光（OSL）测年结果表明，风成砂覆盖作用大概率发生于新仙女木冰阶（Younger Dryas）期间。植物学分析得以重建晚阿勒罗德冰阶典型的植被格局，同时记录到松树与桦木的大型木质残体。