Sökning: "glacial"

Visar resultat 21 - 25 av 197 avhandlingar innehållade ordet glacial.

  1. 21. Post-glacial marine shell-beds in Bohuslän

    Författare :Ernst Antevs; Stockholms högskola; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 22. Event stratigraphy for the Last Glacial-Holocene transition in eastern middle Sweden

    Författare :Jonas Björck; Michael J.C Walker; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Last Glacial-Holocene transition; event stratigraphy; eastern middle Sweden; pollen; plant macrofossils; marine calcareous fossils; microtephra; radiocarbon dating; clay varve chronology; GRIP; ice-core chronology; calendar year chronology; Preboreal oscillation; Yoldia Sea; Baltic Ice Lake; Quaternary Geology; kvartärgeologi;

    Sammanfattning : This thesis outlines an event stratigraphy for the Last Glacial-Holocene transition in eastern middle Sweden. Events are short-lived occurrences that have left traces in the geological record and which, therefore, may be used for correlation and inter-regional comparisons. LÄS MER

  4. 23. Evolutionary history and chloroplast DNA variation in three plant genera: Betula, Corylus and Salix. : The impact of post-glacial colonisation and hybridisation

    Författare :Anna Palmé; Andrew Lowe; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; chloroplast DNA; phylogeography; hybridization; phylogeny; Salix caprea; Betula pendula; Corylus avellana; Biologi; Biology; Biologi; naturvårdsbiologi; Conservation Biology;

    Sammanfattning : The great difference in the level of chloroplast variation and its geographic structure among the three main species studied here demonstrates that forest species do not form a homogeneous group. Hazel shows a genetic structure similar to many other thermophilous species and this structure, in combination with fossil evidence, indicates that the post-glacial colonisation of most of Europe originated in a refugium in western France while the Balkan and Italy were colonised from a south-eastern refugium. LÄS MER

  5. 24. Glacial geomorphology of north-central Labrador-Ungava, Canada

    Författare :Krister N. Jansson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; naturgeografi; Physical Geography;

    Sammanfattning : .... LÄS MER

  7. 25. Glacial geology of Bayan Har Shan, northeastern Tibetan Plateau

    Författare :Jakob Heyman; Arjen P Stroeven; Clas Hättestrand; Helena Alexanderson; Mark D Johnson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical geography; Naturgeografi; Physical Geography; naturgeografi;

    Sammanfattning : The paleoglaciology of the Tibetan Plateau is still largely unexplored, despite its importance for regional and global climate reconstructions. In this thesis a comprehensive glacial geological record is presented from an extensive part of the northeastern Tibetan Plateau centred on the Bayan Har Shan. LÄS MER