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Dataset on the deposits of the semi-circular rampart around the former Viking settlement Hedeby and its vicinity.

ABSTRACT: Soils and sediments are able to preserve traces of human activity in the form of morphological, geochemical and geophysical properties of materials. Thanks to that the study of these materials may provide valuable information about the formation and functioning of archaeological sites. Materials transported for earthwork construction and their configuration preserve important information on the past landscape development, the anthropogenic transformation of the landscape as well as the process of the fortification formation. The UNESCO heritage site Hedeby was one of the most significant proto-towns in Northern Europe and an important trading center in the Viking Age. The town was surrounded by the semi-circular fortification rampart connected to the Danevirke, the Danish fortification system. Due to its dimensions (maximum height 10?m) and good preservation state, the semi-circular rampart is one of the most prominent features of the area. In this article the data on the physico-chemical analysis of the materials from the cores along a coring transect across the semi-circular rampart are presented. The following properties were determined: pH, weight percentage of gravel, charcoal, artefacts, and bones, loss on ignition, magnetic susceptibility, grain size distribution ?2?mm, elemental concentrations. The data is valuable for geoarchaeological analysis of the landscape transformation and the earthwork construction at Hedeby including the reconstruction of the process and the techniques used in the Viking Age. Data on the buried soil found underneath the rampart deposits might provide insight into the surface soils characteristics prior to the rampart construction.

SUBMITTER: Vasiullina A

PROVIDER: S-EPMC7666324 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Dataset on the deposits of the semi-circular rampart around the former Viking settlement Hedeby and its vicinity.

Kurgaeva Anastasiia A Khamnueva-Wendt Svetlana S Wendt Jann J Bork Hans-Rudolf HR

Data in brief 20201201

Soils and sediments are able to preserve traces of human activity in the form of morphological, geochemical and geophysical properties of materials. Thanks to that the study of these materials may provide valuable information about the formation and functioning of archaeological sites. Materials transported for earthwork construction and their configuration preserve important information on the past landscape development, the anthropogenic transformation of the landscape as well as the process o ...[more]

PMID: 33225031

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Project description:Large lacustrine mass movements and delta collapses are increasingly being considered as potential tsunamigenic sources and therefore hazardous for the population and infrastructure along lakeshores. Although historical reports document tsunami events in several lakes in Switzerland, and although the propagation of lake tsunamis has been studied by numerical wave modeling, only little is known about on- and offshore lacustrine tsunami deposits. In Lake Sils, Switzerland, a large prehistoric mass-movement deposit originating from the Isola Delta with a minimum estimated volume of 6.5 × 106 m3 and a basinal thickness of > 6 m in the seismic record has been identified by previous studies and radiocarbon dated to around 700 Common Era. Here, we combine (i) comprehensive sedimentological investigation of sediment cores recovered from the on- and offshore settings, (ii) mineralogical fingerprinting of the inflows from key catchments to characterize sediment provenance, and (iii) numerical tsunami modeling, to test the hypothesis of a tsunamigenic delta collapse in Lake Sils. We observe a clastic event deposit consisting of coarse-grained, fining-upward sand overlying an organic-rich peat deposit in the shallow water. This layer thins and fines landward on the coastal plain. Toward the deeper water (20-40 m), the deposit transforms into a thicker and more heterogeneous sediment package with multiple sequences of fining-upward sand and a well-pronounced clay cap at the top. Radiocarbon dating of the peat underlying the event deposit yields a maximum age of 225-419 calibrated Common Era. The tsunami models, which indicate wave heights reaching up to 5 m, simulate areas of inundation that coincide with the location of event deposits. Based on our results, we propose that the historically undocumented Isola Delta collapse generated a basin-wide tsunami that inundated the lakeshore, transporting large amounts of unconsolidated sediment along the lakeshore toward the coastal plain and into the deeper lake basin.Supplementary informationThe online version of this article (10.1007/s11069-021-04533-y) contains supplementary material, which is available to authorized users.

Dataset Information

Dataset on the deposits of the semi-circular rampart around the former Viking settlement Hedeby and its vicinity.

Publications

Dataset on the deposits of the semi-circular rampart around the former Viking settlement Hedeby and its vicinity.

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