http://popups.lib.uliege.be/3041-5527/index.php?id=574 Publications de Auteurs Philippe Rentzel fr 0 http://popups.lib.uliege.be/3041-5527/index.php?id=954 In the southern End of the Rhine Graben near Basel (Switzerland), an up to 3 m thick stratigraphy of loess deposits and palaeosols was investigated in a construction pit. Field studies in combination with sedimentology, micromorphology and OSL-dating provided insights on the processes of loess deposition, formation of cambisols (brown earth) and periglacial phenomena around 45 (±5.7) ka. A succession of tundra soils on loess preserving locally foliated organic material can be attributed to the time period between 30.8 (±3.7) ka and 29.4 (±3.4) ka. Furthermore the basal deposit of weathered loess yielded an OSL age which dates back to the Eemian interglacial or the very begining of the last glaciation. The outcrop of Basel-Schäublinstrasse provided further information to the ongoing studies on loess deposits, regional landscape evolution and environmental conditions during the late Pleistocene in the southern part of the Upper Rhine Plain. Tue, 03 Dec 2024 10:45:15 +0100 Tue, 03 Dec 2024 10:45:26 +0100 http://popups.lib.uliege.be/3041-5527/index.php?id=954 http://popups.lib.uliege.be/3041-5527/index.php?id=572 In 1996, well preserved deer bones, antler fragments and black grouse bones were found in a filled karst crack. Those animal remains were discovered in a limestone quarry in the Jura Mountains near Dittingen (canton Basel-Landschaft, Northwest Switzerland). The site is located in a gully of a dry valley beneath a loess covered high plain. In the framework of an archaeological excavation, the karst crack filling and overlying sediments (hill-washed loess, soils and colluviums) were documented. Samples for granulometry, geochemistry, micromorphology and palynology were analysed. The animal remains derived from the karstic fissure were radiocarbon dated to the early Bølling Interstadial (14’800 to 14’200 cal. BP). In addition, the palynological study shows that the overlying gully sediments were deposited between the Younger Dryas and the Middle Ages. The interdisciplinary investigation of the sediments revealed new insights into early soil formation processes, morphogenetic events and the vegetation history of periglacial environments. The new results clearly show that soil formation started immediately in the early Late Glacial. Decalcification and clay illuviation quickly developed in the course of intense vertical water flow through the sediment. It is therefore evident that luvisol development took place during the Late Glacial Interstadial (Bølling-Allerød Interstadial). Tue, 26 Nov 2024 15:39:03 +0100 Tue, 26 Nov 2024 15:39:11 +0100 http://popups.lib.uliege.be/3041-5527/index.php?id=572