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Time-transgressive early Holocene vegetational succession following shore displacement: a case study from central Sweden
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik.
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2008 (Engelska)Ingår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 37, nr 1, s. 87-101Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Deglaciation took place in eastern Jamtland and Angermanland in central Sweden c. 10 500 - 10 200 cal. yr BP. In the present study, vegetation development and shore displacement during the earliest ice-free period are investigated by C-14 dating of sediment from six isolated lake basins and by pollen analysis. A brief but distinct peak in Hippophae "occurs in all pollen diagrams coincident with basin isolation, followed by up to 500 years ( varying locally) by an Alnus rise. The Alnus curve does not display a synchronous rise in the area. Its expansion below the highest shore level is time-transgressive and controlled mainly by the timing of basin isolation. The relationship between regional Alnus expansion and changes in hydrology and climate is discussed. The pollen diagrams show Pinus predominance with Corylus to the east ( more coastal areas) and Betula predominance ( though less pronounced) to the west during the period 10 200 - 9000 cal. yr BP. However, comparisons between sites suggest marked variability in the forest development. Shore displacement in easternmost Jamtland c. 10 300 - 9000 cal. yr BP is equal to or slightly more rapid than that of SE Angermanland, contrary to the present pattern of isostatic recovery. A rapid shore level regression c. 10 300 - 10 000 cal. yr BP may be related to drainage of the Ancylus Lake.

Ort, förlag, år, upplaga, sidor
2008. Vol. 37, nr 1, s. 87-101
Nyckelord [en]
early Holocene, 14C dating, pollen analysis, shore displacement, Jämtland
Nationell ämneskategori
Geovetenskap och miljövetenskap
Identifikatorer
URN: urn:nbn:se:miun:diva-4476DOI: 10.1111/j.1502-3885.2007.00005.xISI: 000252393000007Scopus ID: 2-s2.0-62649126502Lokalt ID: 5507OAI: oai:DiVA.org:miun-4476DiVA, id: diva2:29508
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Tillgänglig från: 2008-12-09 Skapad: 2008-11-13 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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Berglund, Mikael

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