Dating Rissian and Würmian glacials in the Bavarian Alpine Foreland and correlation with glaciofluvial equivalents

由于气候条件的变化，巴伐利亚阿尔卑斯山前陆的山前冰川有多个进退期，彭克和布鲁克纳在1909年给出了经典的定义。然而，一个可靠的绝对年表尚未建立。在以前的研究中，年龄分配大多基于对阶地沉积的解释，这是冰川进退时期的结果，并与全球低温时期相关。这些不连续沉积之间的相互对比主要是通过形态、岩相学和高度学特征进行的。我们建议测量冰川变率的绝对宇宙成因~(36)C l暴露年龄和冰川沉积的10Be/26Al等时线埋藏年龄，它们以前被解释为末次冰期(Würmian)和倒数第二次冰期(Rissian)。这将建立这些时期的绝对年表，并使作为冰川进退直接产物的冰雹与前陆的间接冰川沉积相关联。这项研究的绝对年表揭示了中欧气候趋势的发展，并使之能够与全球气候相关联。

Multiple periods of advance and retreat of piedmont glaciers in the Bavarian Alpine Foreland due to changing climatic conditions were classically defined by Penck and Brückner in 1909. However, a robust absolute chronology has not yet been established. Age assignments in previous studies have mostly been based on the interpretation of terrace deposits as a result of periods of glacier advance and retreat and correlation with periods of globally low temperatures. Intercorrelation between these discontinuous deposits has mainly been done by using morphological, petrographical, and hypsometric characteristics. We propose to measure absolute cosmogenic 36Cl exposure ages of glacial erratics and 10Be/26Al isochron burial ages of till and glaciofluvial deposits, which have previously been interpreted as Würmian (ultimate) and Rissian (penultimate glacial period). This will establish an absolute chronology for these periods and enables the correlation of moraines, which are direct products of advancing and retreating glaciers, with indirect glaciofluvial deposits in the foreland. The absolute chronology of this study sheds light on the development of Central European climatic trends and enables the correlation to global climate.