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The Holocene shore displacement of Gästrikland, eastern Sweden: A contribution to the knowledge of Scandinavian glacio-isostatic uplift
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap.
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2005 (engelsk)Inngår i: Journal of Quaternary Science, ISSN 0267-8179, Vol. 20, nr 6, s. 519-531Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The shore displacement in Gästrikland, east-central Sweden, has been investigated by means of AMS radiocarbon dating of sediment cores from isolated basins. Twenty dates from 11 sites are presented. Pollen and diatom analyses, and archive material from the Geological Survey of Sweden, have been used to identify isolation intervals in the cores and as chronological support to the 14C dates. An important pollen stratigraphical time-marker is a distinct mid-Holocene increase in Tilia. For the mid-Holocene, pollen stratigraphy is used rather than the 14C dates for the age determination. The deglaciation of Gästrikland, according to the new 14C dates, took place ca. 11 000 cal. yr BP (ca. 9500 14C yr BP). Through the Holocene the shore displacement is regressive. The regression was initially rapid (on average ca. 3.5 m per 100 yr 11 000-7500 cal. yr BP, probably much more rapid at the earliest stage), then slowed down considerably and was from ca. 5000 cal. yr BP (probably already from 7000 cal. yr BP) relatively constant, ca. 0.8-0.9 m per 100 yr. There are important differences between the shore level curve from Gästrikland and curves from other areas, indicating some irregularities in the regional glacio-isostatic rebound.

sted, utgiver, år, opplag, sider
2005. Vol. 20, nr 6, s. 519-531
Emneord [en]
shore displacement, Gästrikland, glacio-isostasy, pollen stratigraphy, 14C dating
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-1257DOI: 10.1002/jqs.928ISI: 000232212900002Lokal ID: 4677OAI: oai:DiVA.org:miun-1257DiVA, id: diva2:26289
Tilgjengelig fra: 2008-09-30 Laget: 2009-06-08 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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