Doggerland was a land mass occupying an area currently covered by the North Sea until marine inundation took place during the mid-Holocene, ultimately separating the British land mass from the rest of Europe. The Storegga Slide, which triggered a tsunami reflected in sediment deposits in the Northern North Sea, North East coastlines of the British Isles and across the North Atlantic, was a major event during this transgressive phase. The spatial extent of the Storegga tsunami however remains unconfirmed because to date no direct evidence for the event has been recovered from the southern North Sea. We present evidence that Storegga associated deposits occur in the southern North Sea. Palaeo-river systems have been identified using seismic survey in the southwestern North Sea and sedimentary cores extracted to track the Mid Holocene inundation. At the head of one palaeo-river system near the Outer Dowsing Deep, the Southern River, we observed an abrupt and catastrophic inundation stratum. Based on lithostratigraphic, macro and microfossils and sedimentary ancient DNA (sedaDNA) evidence, supported by optical stimulation luminescence (OSL) and radiocarbon dating, we conclude these deposits were a result of the Storegga event. Seismic identification of this stratum to adjacent cores indicated diminished traces of the tsunami, largely removed by subsequent erosional processes. Our results demonstrate the catastrophic impact of Storegga within this area of the Southern North Sea, but indicate that these effects were temporary and likely localized and mitigated by the dense woodland and topography of the area. We conclude clear physical remnants of the wave are likely to be restricted to inland basins and incised river valley systems.

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关于Storegga滑坡海啸对北海南部全新世早期景观的影响的多种代理证据

Doggerland是一块土地块，目前占领了北海，直到全新世中期海域泛滥为止，最终使英国的土地块与欧洲其他地区分离。Storegga Slide在北海北部海域，不列颠群岛东北海岸线和北大西洋海域的沉积物中引发了海啸，是这一海侵阶段的重要事件。然而，Storegga海啸的空间范围仍未得到确认，因为迄今为止，尚未从北海南部发现该事件的直接证据。我们提供的证据表明，与Storegga相关的矿床发生在北海南部。已通过在北海西南部进行的地震勘测确定了古河流系统，并提取了沉积岩心来追踪全新世中期的淹没。在南部河流地区，我们观察到了突然而灾难性的淹没地层。基于岩石地层学，宏观和微化石以及沉积的古代DNA（sedaDNA）证据，在光激发发光（OSL）和放射性碳测年的支持下，我们得出结论，这些矿床是Storegga事件的结果。对该地层至相邻岩心的地震识别表明，海啸的痕迹减少了，大部分被后续的侵蚀过程消除了。我们的结果证明了Storegga在北海南部地区的灾难性影响，但表明这些影响是暂时的，可能被该地区茂密的林地和地形所局限并减轻了。我们得出的结论是，波浪的明显物理残留物可能仅限于内陆盆地和切开的河谷系统。