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Holocene coastal landscape development in response to rising sea level in the Central Wadden Sea coastal region
Netherlands Journal of Geosciences ( IF 1.6 ) Pub Date : 2021-04-30 , DOI: 10.1017/njg.2021.10
Martina Karle , Friederike Bungenstock , Achim Wehrmann

The Holocene sea-level rise has led to significant changes in present-day coastal zones through multifold retrogradational and slightly progradational displacements of the mainland coastline. During the course of this postglacial transgression, sediments characteristic of coastal environments accumulated first in palaeovalleys of the pre-Holocene landscape and later on the subsequently developed coastal plain. Based on a compilation of sedimentological, lithological and litho-chronostratigraphical data of more than 1200 sediment cores, we generated four palaeogeographic maps of the coastal zone of the central Wadden Sea to document with a high spatial resolution the landscape changes during characteristic phases of the Holocene sea-level rise, i.e. the periods 8600–6500 cal BP, 6500–2700 cal BP, 2700–1500 cal BP and 1500–1000 cal BP. Along three cross-sections, representing different hydrodynamic conditions and exposure, we exemplify how the Holocene landscape development and sedimentary facies types are controlled by the local palaeorelief, sea-level changes, sediment supply, accommodation space, the morphodynamic impact of channel shifts, and their erosion base. This leads to a better understanding of main factors controlling the local depositional processes of the coastal landscape along the central Wadden Sea during the Holocene transgression.

中文翻译:

应对中瓦登海沿岸地区海平面上升的全新世海岸景观开发

全新世海平面上升通过大陆海岸线的多次退积和轻微进积位移导致了当今沿海地区的显着变化。在这次冰后海侵过程中,具有沿海环境特征的沉积物首先在全新世前景观的古山谷中积累,然后在随后发展的沿海平原上积累。基于对 1200 多个沉积物岩心的沉积学、岩性和岩石年代地层数据的汇编,我们生成了瓦登海中部沿海地区的四张古地理图,以高空间分辨率记录了全新世特征阶段的景观变化海平面上升,即 8600-6500 cal BP、6500-2700 cal BP、2700-1500 cal BP 和 1500-1000 cal BP 的时期。沿着代表不同水动力条件和暴露的三​​个横截面,我们举例说明了全新世景观发展和沉积相类型如何受当地古地貌、海平面变化、沉积物供应、住宿空间、河道移动的形态动力学影响以及他们的侵蚀基地。这有助于更好地了解在全新世海侵期间控制瓦登海中部沿海景观局部沉积过程的主要因素。
更新日期:2021-04-30
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