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Variable isostatic uplift patterns during the Holocene in southeast Sweden, based on high-resolution AMS radiocarbon dates of lake isolations - a preliminary interpretation
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi.
2008 (Engelska)Ingår i: Polish Geological Institute Special Papers, ISSN 1507-9791, Vol. 23, s. 77-80Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

To describe changes in shoreline configuration in northern Uppland, south-east Sweden, the isolations of 17 present and overgrown lakes have been interpreted from diatom analysis and AMS radiocarbon dates on terrestrial macrofossils. The sites studied are spread c. 60 km in east-west and c. 70 km in north-south direction. The oldest isobase direction, representing the “Neolithic Sea”, extends in more or less north-south direction. The present day isobase system shows a clear east-west trend. The results indicate a complicated pattern of isostatic uplift during the late Holocene. We have defined five different shore displacement curves denoted A – E. It is obvious that the present day east-western isobase system is not valid for the investigated sites. Instead, the north-south isobases for the “Neolithic Sea“ should to a relatively high degree explain the geographic distribution of sites. It is suggested that a re-direction of the isostatic uplift pattern has occurred sometime during the last c. 5000 years. This shift could have taken place as a slow deformation of the bedrock and/or as neotectonic movements along existing fault lines.

Ort, förlag, år, upplaga, sidor
2008. Vol. 23, s. 77-80
Nyckelord [en]
isostatic uplift, AMS radiocarbon dating, Holocene, southeastern Sweden
Identifikatorer
URN: urn:nbn:se:su:diva-15449OAI: oai:DiVA.org:su-15449DiVA, id: diva2:181969
Tillgänglig från: 2008-12-03 Skapad: 2008-12-03 Senast uppdaterad: 2011-01-10Bibliografiskt granskad

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