Potassium-argon ages of schist honestones from the viking age sites at Kaupang (Norway), Aggersborg (Denmark), Hedeby (West Germany) and Wolin (Poland), and their archaeological implications |
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Authors: | JG Mitchell H Askvik HG Resi |
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Institution: | 1. The School of Physics. University of Newcastle-upon-Tyne, Newcastle-upon-Tyne NE1 7RU, England;2. Geological Institute, University of Bergen, Norway;3. Historical Museum, University of Bergen, Norway |
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Abstract: | Viking age honestones from four large sites in northern Europe have been made from two different types of quartz-muscovite schist: one dark grey, very fine-grained schist, and a light grey, fine-grained schist. In order to determine the provenance of these schist hones, KAr ages have been determined on 16 selected representative hones. The dark grey schist hones yield Caledonian ages of 403–446 Ma. and consideration of petrographic evidence leads to the conclusion that the hones were quarried in the Caledonian area (presumably) of Western Norway. The light grey schist hones are Precambrian, with KAr ages of 931–946 Ma, and are presumed to originate from Telemark, South Norway. The amount and homogeneity of these honestone groups from different parts of the Viking world indicates the existence of large quarries, and demonstrates that production and trade were more wide-ranging than had hitherto been assumed. |
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Keywords: | Norway Kaupang Eidsborg Denmark Aggersborg West Germany Hedeby Poland Wolin viking potassium-argon age petrology honestone schist trade |
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