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Lateglacial to Holocene pedogenesis and formation of colluvial deposits in a loess landscape of Central Europe (Wetterau, Germany)

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Abstract Loess areas in Central Europe have been settled since ancient times and are therefore predestined to archive information about both the paleoenvironment with and without human activities. In gentle… Click to show full abstract

Abstract Loess areas in Central Europe have been settled since ancient times and are therefore predestined to archive information about both the paleoenvironment with and without human activities. In gentle rolling loess-landscapes distinct short and shallow valleys, so-called dells, are prominent landscape elements that act as sediment traps. The loess-paleosol-colluvium (LPC) sequence of Gambach (Wetterau, Germany) can be regarded as an exceptional sequence for Lateglacial-Holocene pedogenesis and human impact in dry loess landscapes with The LPC sequence of Gambach reflects climate-controlled pedogenesis from ca. 15 ka to 4.7 ka with the formation of a Cambisol having some properties related to Chernozem soil forming processes during the Lateglacial. A Chernozem is developed in the deposits of the Laacher See Tephra, which still show the influence of periglacial climate in their lowermost part. The upper part of these deposits was relocated by colluvial processes at around 6.7 ka. Chernozem soil forming processes were still ongoing until 4.7 ka when these shifted to Luvisol formation, which is still active today. Since 4.7 ka, extended land use - with indications of agricultural fire use since at least 2.3 ka - led to the formation of colluvial deposits combined with a topographic leveling of upland positions on a landscape-scale. The results of the formative element of humans on loess landscapes from the Wetterau can also be taken as representative for around 9400 km2 of dry loess landscapes in Central Europe.

Keywords: loess landscapes; central europe; pedogenesis; formation; wetterau germany

Journal Title: Catena
Year Published: 2017

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