miun.sePublikasjoner
Endre søk
Begrens søket
1 - 4 of 4
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Berglund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för tillämpad naturvetenskap och design.
    Early Holocene in Gästrikland, east central Sweden: Shore displacement and isostatic recovery2012Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 41, nr 2, s. 263-276Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In GÀstrikland in central Sweden, deglaciation took place c. 11000cal. a BP. In the present study the shore displacement during the earliest ice-free period is investigated by the 14C dating of sediment from isolated lake basins. The shore displacement in GÀstrikland includes an initial phase (∌500 years) of rapid regression, followed by a slowing of the relative sea level (RSL) fall to a rate similar to that of the remaining Holocene c. 9250cal. a BP. The Ancylus Lake stage of the Baltic Sea belongs to the analysed interval. The RSL curve and glacial unloading history are used to separate and quantify elements of isostatic uplift. The postglacial uplift is ∌260m, of which ∌45m forms a rapid initial rise, which can be treated as qualitatively separate from the later, slower rise. There is considerable glacial unloading just prior to the deglaciation, but calculations suggest that only a small part of this relates directly to the rapid early Holocene rebound: most unloading is transferred either to uplift immediately prior to the deglaciation or to subsequent Holocene or future uplift. The isostatic rise in GÀstrikland occurring between the end of the Younger Dryas stadial and the deglaciation, c. 11500-11000cal. a BP, is estimated to be 100-110m. Observations and estimations are incompatible with a Weichselian maximum ice thickness much smaller that 3000m. The lack of glacial unloading during the Younger Dryas has a measurable impact on the Holocene isostatic rebound in GÀstrikland, reducing it by an estimated 20-25m. © 2011 The Boreas Collegium.

  • 2.
    Berglund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap.
    Holocene shore displacement and chronology in Ångermanland, eastern Sweden, the Scandianvian glacio-isostatic uplift centre2004Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 33, nr 1, s. 48-60Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The shore displacement during the Holocene in southeastern Ångermanland, Sweden, has been investigated by means of radiocarbon-dating of isolation intervals in sediment cores from a total of nine new basins. Results from earlier investigations have been used in complement. There is a forced regression in the area from c. 9300 BP (c. 10 500 cal. yr BP) until c. 8000 BP (c. 9000 cal. yr BP), on average c. 8 m/100 years, after which there is a gradually slowing regression of c. 2.5-1.0 m/100 years up to the present time. The most rapid regression occurs during the later phase of the Ancylus Lake stage, 9500-9000 cal. yr BP. There is no evidence of halts in the regression. Crustal uplift in the area since deglaciation is c. 310 m. The deglaciation of southeastern Ångermanland took place c. 9300 BP (c. 10 500 cal. yr BP); this is c. 900 years earlier than the age given by clay varve dating. The shore displacement curve provides a means of estimating the difference between the clay varve time scale and calibrated radiocarbon dates, by comparison with varve-dated altitudes of alluvial deltas of the River Ångermanälven. From c. 2500 to c. 8000 cal. BP there is a deficit in clay varves of some 300 years; further back in time this discrepancy increases significantly. The main explanation for the discrepancy is most likely lacking varves in the time-span 8500-10 200 cal. yr BP, located along the upper reaches of River Ångermanälven below the highest shore level

  • 3.
    Berglund, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik.
    Time-transgressive early Holocene vegetational succession following shore displacement: a case study from central Sweden2008Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 37, nr 1, s. 87-101Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 4.
    Carlsson, Ralf
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap.
    Shell gravel deposits on the Åland Islands, southwestern Finland, with special reference to the molluscan assemblages2002Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 31, nr 2, s. 203-211Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Twenty-six shell gravel sites at elevations between 3 and 35 m a.s.l. were found on the Aland Islands. The faunal composition was determined on 14 of these locations and Mytilus edulis and Macoma bulthic a were found everywhere. Another common species was Hydrobia ulvae. while H. ventrosa, Littorina saxatilis and Cerasto-derma glaucum were more sporadic. This species assemblage implies that the salinity of the area as about 10parts per thousand. when the animals lived there. The deposits on the N-NE hilltops generally have southerly to westerly aspect, while those of the south-central hilltops are easterly. On the basis of a C-14-dated stratified deposit it is suggested that each deposit was formed during a relatively short period of time. As a hilltop emerged from the sea. glacial debris was flushed down. Shell-bearing molluscs colonized the bare rock surface and were flushed down and formed the shell gravel deposit as the shoreline displacement continued. At a later stage. as the more concave part of the hilltop was subject to wave action. erosion was weaker and the shell gravel deposit was covered by beach sand. Since the hills may be of different elevation, it is concluded that trying to date ancient shorelines from shell gravel deposits is not justified. as each deposit originates from the hill with which it is associated.

1 - 4 of 4
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf