Sökning: "lower Silurian"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden lower Silurian.

  1. 1. Enigmatic worm-like fossils from the Silurian Waukesha Lagerstätte, Wisconsin, USA

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Märta Westberg; [2019]
    Nyckelord :Waukesha Lagerstätte; Silurian; soft-tissue preservation; Palaeoscolecida; Annelida; Arthropoda Waukesha Lagerstätte; silur; mjukvävnadsbevaring; Arthropoda; Earth and Environmental Sciences;

    Sammanfattning : The lower Silurian Waukesha Lagerstätte of Wisconsin, USA, is a Konservat-Lagerstätte which has yielded a diverse assemblage of exceptionally well-preserved soft-bodied organisms. This study comprises first-hand descriptions and assessments of 23 enigmatic worm-like specimens from the Waukesha Lagerstätte, alongside a literature review. LÄS MER

  2. 2. Stratigraphy, sedimentology and geophysical assessment of the early Silurian Halla and Klinteberg formations, Altajme core, Gotland, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Christopher Artursson; [2018]
    Nyckelord :Gotland; gamma ray; stratigraphy; carbonate sedimentology; drill core; Altajme; Ala-Fjäle; Klinteberg Formation; geophysical survey; Earth and Environmental Sciences;

    Sammanfattning : The Altajme drillcore was recovered from near Buttle in central Gotland in 2015. The core was drilled in outcrop belt of the late Wenlock (Silurian) Klinteberg Formation as a result from an international drilling campaign between the Department of Geology at Lund University and Iowa University, USA. LÄS MER

  3. 3. Pressure-Temperature-time Constraints on the Deep Subduction of the Seve Nappe Complex in Jämtland and southern Västerbotten, Scandinavian Caledonides

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Johanna Holmberg; [2017]
    Nyckelord :Seve Nappe Complex; COSC-1; Raman spectroscopy; QuiG barometry; kyanite-garnet gneiss; Lu-Hf garnet geochronology; Seveskollan; COSC-1; Raman spektroskopering; QuiG barometri; kyanit-granatförande gnejs; Lu-Hf granat geokronologi;

    Sammanfattning : The Scandinavian Caledonides are defined by long transported thrust sheets emplaced in a nappe stratigraphic succession onto the Paleozoic Baltica platform, as a result of the collision between the paleo-continents Baltica and Laurentia. This Palaeozoic collisional orogen is nowadays exposed at mid-crustal levels, thus provides an excellent ground for in situ studies of mountain building processes. LÄS MER

  4. 4. The Metamorphic History of the Helags Mountain Area, Scandinavian Caledonides

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Sara Johansson; [2016]
    Nyckelord :Seve Nappe Complex; Scandinavian Caledonides; metamorphism; monazite geochronology; garnet;

    Sammanfattning : The Scandinavian Caledonides formed as a result of collision between the continents Baltica and Laurentia, in Silurian and Early Devonian time. The evolution of the orogen has been a topic of research since before the turn of the last century. LÄS MER

  5. 5. Stratigraphy, facies and depositional history of the Colonus Shale Trough, Skåne, southern Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Magnus Eriksson; [2012]
    Nyckelord :Sweden; tec-tonic subsidence; gamma ray; backstripping; Lower Palaeozoic; Colonus Shale Trough; Sorgenfrei-Tornquist Zone; Colonustråget; Sorgenfrei-Tornquistzonen; underpaleozoikum; tektonisk subsidens; Sverige; Earth and Environmental Sciences;

    Sammanfattning : Colonustråget är en viktig tektonisk enhet i den s.k. Sorgenfrei-Tornquistzonen i Skåne, södra Sverige. Den sedimentära sekvensen består av en kambrisk till silurisk succession dominerad av finkorniga klas-tiska sediment samt en mindre del kalksten. LÄS MER