Pollen record from Blankensee, Germany

Lake Blankensee is filled with 14 m of late- and postglacial deposits, Lake Siethener See with 22,5 m. The lacustrine sedimentation begins in Lake Siethener See in the middle of the Alleröd with annual lamination which partly continues in the Younger Dryas. A 2 cm thick layer of the Laacher See tephra was found in both lakes, the Saksunarvatn tephra only in Lake Siethener See where the cool Rammelbeek-phase (Preboreal) could be shown. The youngest part of the sediment profiles is suspended drifting mud. Masses of Pediastrum (algae) indicate an increasing shoaling of Lake Blankensee after the Subboreal.

布兰肯湖（Lake Blankensee）的沉积厚度达14米，为晚冰期晚期及冰后期沉积物；锡滕湖（Lake Siethener See）的沉积厚度则为22.5米。锡滕湖的湖相沉积始于阿勒罗德冰阶（Alleröd）中期，发育年纹层，且该纹层在新仙女木事件（Younger Dryas）期间仍有部分延续。两座湖泊中均发现了厚度为2厘米的拉赫湖火山灰层（Laacher See tephra）；萨库纳瓦特恩火山灰层（Saksunarvatn tephra）仅见于锡滕湖，该湖中还识别出代表冷期的拉梅贝克期（Rammelbeek-phase，前北方期，Preboreal）。沉积剖面的最顶层为悬浮漂移泥。亚北方期（Subboreal）之后，盘星藻属（Pediastrum，藻类）的大量产出，表明布兰肯湖的湖盆逐渐变浅。