Sökning: "Dating impact events"

Hittade 4 avhandlingar innehållade orden Dating impact events.

  1. 1. Geochronology of impact structures - constraining syn- and post-impact processes using the 40Ar/39Ar and U-Pb techniques

    Författare :Maria Herrmann; Berggrundsgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Impact structure; Dating impact events; 40Ar 39Ar dating; U-Pb dating; Siljan impact structure; Mien impact structure; Hummeln impact structure; Puchezh-Katunki impact structure;

    Sammanfattning : The discovery, at the beginning of the 20th century, that elements can transform into other elements, due to the spontaneous decay of an instable to a stable atomic nuclei, gave rise to a powerful source for age information in many fields of earth science. For impact structures, it is crucial to establish well-defined and precise ages in order to understand how impact events affect the Earth’s geo and biosphere and also with regard to possible future events that can have devastating effects on our civilization. LÄS MER

  3. 2. Aeolian dunes of central Sweden

    Författare :Martin Bernhardson; Kvartärgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Aeolian deposits; Inland dune; LiDAR; Digital elevation model; GIS; Luminescence dating; Holocene; Sweden;

    Sammanfattning : In the Swedish inland there are aeolian deposits present, ranging from scattered single dunes to dune fields of more than 10 km2. These dune fields often pass unnoticed since they presently are covered by vegetation. However, they contain a rich palaeoenvironmental archive. LÄS MER

  4. 3. Cognitive work analysis in practice : Adaptation to project scope and industrial context

    Författare :Ida Bodin; Anders Jansson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Datavetenskap med inriktning mot människa-datorinteraktion; Computer Science with specialization in Human-Computer Interaction;

    Sammanfattning : The Cognitive Work Analysis (CWA) framework is widely used by researchers for the analysis of complex systems. It, however, lacks the same impact amongst industrial practitioners. This thesis investigates possible adaptations of the framework to project and industrial constraints, and the consequences associated with such adaptations. LÄS MER

  5. 4. Landslide Archaeology : Past hazards and disasters in the Göta River Valley and beyond

    Författare :Anton Larsson; Mats Burström; Lars-Ove Westerberg; Christina Rosén; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Landslides; Disasters; Disasterscape; Natural Hazards; Historical Archaeology; Iron Age; Vendel Period; Viking Period; Medieval; Middle Ages; Early Modern; Cultural Heritage; Geoculturality; Climate Change; Anthropocene; arkeologi med inriktning mot allmän arkeologi; Archaeology with General Specialisation;

    Sammanfattning : Exploring the impact of landslides on past human communities, their landscapes, and their material remains, this thesis focuses on the most landslide-prone region of Sweden: the Göta River Valley (Sw. Göta älvdalen). LÄS MER