Search for dissertations about: "early Palaeozoic"

Showing result 11 - 15 of 15 swedish dissertations containing the words early Palaeozoic.

  2. 11. Diversity and Life Habits of Silurian Strophomenide Brachiopods of Gotland

    Author : Ole Andreas Hoel; Lars E. Holmer; Michael Bassett; David A. T. Harper; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Gotland; Silurian; brachiopod; functional morphology; ecology; Llandovery; Wenlock; Ludlow; Strophomenoidea; Geovetenskap; Earth sciences; Geovetenskap;

    Abstract : The Superfamily Strophomenoidea is a very diverse group of brachiopods in the Early Palaeozoic. In the Silurian succession on Gotland, they are among the most easily identifiable, and commonly found fossils. READ MORE

  4. 12. Evolution and ecology of Baltic late Ordovician univalved molluscs

    Author : Jan Ove Rõysi Ebbestad; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

    Abstract : Univalved molluscs (Gastropoda and Tergomya) are common fossils in the Palaeozoic succession across Baltoscandia, but most of the more embracive descriptive works on this group appeared before or near the turn of the 19th century. The study presented here aims at revision and description of some Baltoscandian late Ordovician/early Silurian univalved molluscs with emphasis on their shell morphology. READ MORE

  5. 13. The West Ny Friesland Terrane : An exhumed mid-crustal obliquely convergent orogen : by Patrik W. Nilsson

    Author : Patrik W. Nilsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Abstract : Ny Friesland, in northeastern Svalbard, is the type-area for transpressive orogeny. The West Ny Friesland Terrane (WNT) is composed of a c. 12 km thick basal succession of amphibolite-grade schists and gneisses, previously thought to be the lower of a c. 20 km thick succession of concordant, volcano-sedimentary strata. READ MORE

  6. 14. Seismic stratigraphy and tectonics offshore Scania, south-western Baltic Sea

    Author : Wasim Paracha; Boris Winterhalter; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; allmän och historisk geologi; General and Historical Geology;

    Abstract : Geophysical data and descriptions of deep wells, produced during hydrocarbon explorations in the south-western part of the Baltic Sea offshore Scania, have revealed new information on the geological development of the area. This investigation is concentrated to the offshore triangular segment between the northwest-southeast Permian Sorgenfrei-Tornquist Zone through Scania and the east-west Caledonian Front north of Rügen. READ MORE

  7. 15. 40Ar/39Ar, AFT and (U-Th)/He thermochronologic implications for the low-temperature geological evolution in SE Sweden

    Author : Pia Söderlund; Berggrundsgeologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; 40Ar-39Ar; Fennoscandian Shield; U-Th He; AFT; geochronology; thermochronology; cooling; uplift;

    Abstract : The Oskarshamn and Forsmark areas in the Fennoscandian Shield, SE Sweden, have been chosen as potential sites for hosting highly radioactive nuclear waste. To evaluate their respective suitability, the geological history of the bedrock in these two areas has been investigated. This study has focused on the thermal evolution, from c. 500 °C to c. READ MORE