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Repeated aeolian deflation during the Allerød/GI-1a-c in the coversand lowland of NW Belgium
Catena ( IF 6.2 ) Pub Date : 2020-01-24 , DOI: 10.1016/j.catena.2020.104453
Philippe Crombé , Johanna A.A. Bos , Frédéric Cruz , Jeroen Verhegge

The results of multi-disciplinary research carried out on the deposits of the Moerbeke “Driehoek” site, located along the northern bank of the extensive Moervaart palaeolake (NW Belgium), are presented. The multi-proxy study, including sedimentological (organic matter, calcium carbonate and grain-size) and botanical (pollen, macrofossils, NPP) analyses, provided evidence of repeated aeolian deflation during the Allerød. Our results demonstrate, in combination with evidence from other soil archives within the Moervaart area, that the Allerød period in NW Europe was sedimentologically much less stable than hitherto assumed, especially during the GI-1c2 event and middle Allerød. Some of the Allerød deflation events were caused by centennial abrupt climatic oscillations, such as the short but pronounced cold GI-1c2 event, while others were likely the result of intense forest fires or a combination of both. These observations call for a revision of the existing Lateglacial litho- and chronostratigraphic schemes for the sand-belt of northern Europe.



中文翻译:

在比利时西北部低地的Allerød/ GI-1a-c期间反复发生风蚀

介绍了对位于广泛的Moervaart古湖(比利时西北部)北岸的Moerbeke“ Driehoek”遗址的沉积物进行的多学科研究的结果。包括沉积学(有机物,碳酸钙和颗粒大小)和植物学(花粉,大型化石,NPP)的多代理研究提供了在Allerød期间反复风蚀的证据。我们的结果与来自Moervaart地区其他土壤档案的证据相结合,证明欧洲西北部的Allerød时期在沉积学上比迄今所假设的要稳定得多,尤其是在GI-1c2事件和中层Allerød时期。一些Allerød通缩事件是由百年突然的气候振荡引起的,例如短暂但明显的寒冷GI-1c2事件,其他人则可能是森林大火或两者兼而有之的结果。这些观察结果要求对北欧砂带的现有晚冰期岩石地层和年代地层方案进行修订。

更新日期:2020-01-24
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