Aeolian activity in Sweden: an unexplored environmental archive
Forskningsoutput: Bok/rapport › Rapport
The largest and best developed dune fields are found at glacifluvial deposits in Värmland and Dalarna, while in areas south thereof there are mainly scattered dunes or coversand deposits. A range of dune types has been observed, but transverse dunes seem to be dominating and the majority of these are oriented roughly NE-SW. The bulk of the aeolian deposits were formed shortly after the local deglaciation and, once stabilised, do not appear to have been significantly reworked during the Holocene. Most Mid- and Late-Holocene aeolian deposits consist of coversand, apart from in coastal areas where e.g. young foredunes are found.
Our results thus largely confirm the hypothesis of previous investigators but we do add a significant amount of new information. We provide, for the first time for most of our study areas, numerical ages for the aeolian deposits and thus provide the timing and duration of sand-drift events in south-central Sweden. The ages, in combination with detailed geomorphological mapping, allow us to distinguish phases of dune-field development, which are likely due to changes in wind patterns and vegetation cover, and also to correlate Swedish aeolian deposits to regional storminess periods. Based on sedimentological information we are able to reconstruct dominating depositional processes, transport paths and sediment sources. Additional outcomes of the project are e.g. methodological developments (LiDAR mapping, luminescence dating) and pilot studies of potential relevance for applied geology (coastal development).
|Enheter & grupper|
Ämnesklassifikation (UKÄ) – OBLIGATORISK
|Förlag||Department of Geology, Lund University|
|Uppdragsgivare||Sveriges Geologiska Undersökning, SGU|
|Status||Published - 2016 aug 26|
|Förlag||Quaternary Sciences, Department of Geology|
Sveriges Geologiska Undersökning, SGU
2013/01/01 → 2016/12/31
Projekt: Forskning › Nationellt samarbete