Sökning: "Kvartärgeologi"

Visar resultat 26 - 30 av 157 avhandlingar innehållade ordet Kvartärgeologi.

  1. 26. Towards a Holocene tephrochronology for the Azores

    Författare :Hans Johansson; Stefan Wastegård; Otto Hermelin; Ewa M. Lind; Christine S. Lane; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kvartärgeologi; Quaternary Geology;

    Sammanfattning : The Azores is situated in the North Atlantic Ocean and is one of the most active volcanicregions in the Northern Hemisphere. The volcanic history of the islands is fairly wellknown and several explosive trachytic eruptions have been reported but the geochemicalcompositions of the glass component of the tephra as well as the dispersal oftephras to distal areas are less well known. LÄS MER

  3. 27. An integrated systems approach to biogeochemical processes: Evalution of metal retention in a wetland receiving acid main drainage

    Författare :G Jordan; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quaternary geology; Kvartärgeologi;

    Sammanfattning : .... LÄS MER

  4. 28. Rapid deglaciation and ice sheet retreat in the Stockholm area : a sedimentological perspective

    Författare :Amir Mokhtari Fard; Tom A.J van Loon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quaternary Geology; kvartärgeologi;

    Sammanfattning : .... LÄS MER

  5. 29. The Eemian Interglacial at Sokli, northern Finland : A multi-proxy environmental and climatic reconstruction based on a 9 m long lacustrine sediment sequence

    Författare :Anna Plikk; Karin F. Helmens; Oliver Heiri; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Last Interglacial MIS5e ; northern Europe; palaeolimnology; palaeoecology; temperature reconstruction; multiple proxies; climate dynamics; climatic events; kvartärgeologi; Quaternary Geology;

    Sammanfattning : Understanding the fundamentals of the Earth’s climate system during the Quaternary Period (the past ca 2.6 million years) is of imminent interest in light of the reported recent climatic changes. LÄS MER

  7. 30. Human Impact on Vegetation of Coastal Estonia during the Stone Age

    Författare :Anneli Poska; Dagfinn Moe; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Estonia; pollen analysis; Holocene; pre-agrarian human impact; introduction of arable farming; Geovetenskap; Earth sciences; Geovetenskap; Quarternary Geology; kvartärgeologi;

    Sammanfattning : This thesis presents the dynamics of vegetation and human impact on the environment in coastal Estonia during the Holocene. The sediments of five mires and two lakes from the mainland and from Saaremaa island, and a cultural layer of an Early Mesolithic settlement at Pärnu River were investigated by means of pollen analysis (modern and fossil pollen spectra), 14C dating (AMS and conventional dating) and numerical analysis of pollen data (rarefaction analysis, zonation and principal components analysis). LÄS MER