Search for dissertations about: "Ordovician"

Showing result 21 - 25 of 40 swedish dissertations containing the word Ordovician.

  2. 21. Lower Ordovician carbonate sedimentology and lithostratigraphy of northern Öland, Sweden

    Author : Ulf Nordlund; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  4. 22. Shipborne geophysical study of an Ordovician-Silurian carbonate platform, Fårö - Hiiumaa area, northeastern Baltic Sea

    Author : Igor Tuuling; Jan Bergström; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Historical Geology and Paleontology; historisk geologi och paleontologi;

    Abstract : The lithological-stratigraphical subdivision, the internal structure and the present relief of the Lower Paleozoic bedrock sequence was investigated by means of high resolution shallow marine seismic reflection profiling in the northeastern Baltic Sea.The Cambrian, as well as the lowermost Silurian layers, show rapidly changing lithologies and thicknesses and provide no trans-Baltic seismic reflectors. READ MORE

  5. 23. The flux of extraterrestrial matter to Earth as recorded in Paleogene and Middle Ordovician marine sediments

    Author : Anders Cronholm; Berggrundsgeologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; L-chondite; sediment-disperesed; chromite; break-up event; Arenig-Llanvirn;

    Abstract : This thesis aims at reconstructing events in the solar system, mainly collisional events in the asteroid belt, by searches for extraterrestrial minerals in Paleogene and Middle Ordovician marine sediments on Earth. Recent empirical evidence show that Earth has experienced a few brief periods during the Phanerozoic when the flux of extraterrestrial matter significantly increased. READ MORE

  6. 24. Extraterrestrial chromite as tracer of ancient meteorite flux - evidence from condensed Middle Ordovician limestone in southern Sweden

    Author : Therese Häggström; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  7. 25. Conodont biostratigraphy and diversity in The Lower-Middle Ordovician of Eastern Baltoscandia (St. Petersburg region, Russia) and Kazakhstan

    Author : Tatiana Tolmacheva; Richard Aldrigde; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

    Abstract : Conodonts were first discovered and described by Christian Pander in 1856 from the St. Petersburg region. READ MORE