Sökning: "Sinemurian"

Hittade 5 uppsatser innehållade ordet Sinemurian.

1. 1. Record of the end-Triassic mass extinction in shallow marine carbonates: the Lorüns section (Austria)

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Linus Brakebusch; [2022]
   Nyckelord :sedimentology; geochemistry; ooids; oolites; oncoids; oncolites; Triassic; Jurassic; Rhaetian; Hettangian; ocean acidification; Earth and Environmental Sciences;

   Sammanfattning : The end-Triassic mass extinction (ETE) was one of the five big mass extinctions of the Phanerozoic and occurred ~201 Ma ago. Research agrees that the main triggering factor for the ETE was the eruptions of the Central Atlantic Magmatic Volcanic Province (CAMP), linked to the break-up of the supercontinent Pangaea. LÄS MER

3. 2. Evidence of epibenthic microbial mats in Early Jurassic (Sinemurian) tidal deposits, Kulla Gunnarstorp, southern Sweden

   Kandidat-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Olof Peterffy; [2013]
   Nyckelord :Sweden; Kulla Gunnarstorp; jurassic; wrinkle structures; microbially induced sedimentary structures; skrynklestrukturer; mikrobiellt inducerade sedimentstrukturer; jura; Sverige; Earth and Environmental Sciences;

   Sammanfattning : Wrinkle structures, a type of microbially induced sedimentary structures (MISS) were found in Jurassic tidally deposited heterolites of Kulla Gunnarstorp, southern Sweden. Wrinkle structures are characterizeded by minute, commonly elongate crinkles on the upper bedding planes of fine grained arenites. LÄS MER

4. 3. Lithofacies analysis and heterogeneity study of the subsurface Rhaetian-Pliensbachian sequence in SW Skåne and Denmark

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Samer Bou Daher; [2012]
   Nyckelord :Sorgenfrei-Tornquist Zone; Höllviken Halfgraben; Rhaetian; Hettangian; Sinemurian; Pliensbachian; sequence stratigraphy; lithofacies; reservoir; geothermal; CO2 storage; Sorgenfrei- Tornquistzonen; Höllvikensänkan; sekvensstratigrafi; reservoar; geotermisk; CO2-lagring; Earth and Environmental Sciences;

   Sammanfattning : The geological setting of Skåne is the outcome of successive phases of transtensional tectonics, block-faulting, subsidence, transpression and inversion focused around the Sorgenfrei-Tornquist Zone. The Höllviken Halfgraben is one of the major blocks in southwestern Skåne with a Rhaetian–Pliensbachian succession characterized by interbedding of arenaceous and argillaceous facies of local and regional extent. LÄS MER

5. 4. Extraterrestrisk och terrestrisk kromrik spinell i fanerozoiska kondenserade sediment

   Magister-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Maria Nolvi; Gunilla Thorelli; [2006]
   Nyckelord :physical geography; condensed sediments; cyclic sedimentation; spherules; chrome spinels; extraterrestrial chromite; cyklisk sedimentation; kondenserade sediment; sfäruler; kromspineller; geomorphology; pedology; cartography; climatology; naturgeografi; geomorfologi; marklära; kartografi; klimatologi; extraterrestrisk kromit; Earth and Environmental Sciences;

   Sammanfattning : This study aims to assess the normal inflow of extraterrestrial chromite to Earth. The results from the investigation are compared to earlier studies of middle Ordovician Orthoceratite Limestone in which 1 - 3 extraterrestrial chromite grains ( >63 ƒÊm ) per kilogram limestone were found. LÄS MER

7. 5. Late Triassic and Early Jurassic palynology of the Höganäs Basin and the Ängelholm Trough, NW Scania, Sweden

   Magister-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Linda M. Larsson; [2003]
   Nyckelord :Transitional interval; Pinuspollenites-Trachysporites Zone; Scania; Rhaetian; Palynology; Hettangian; Cerebropollenites macroverrucosus Zone; Helsingborg Member; Döshult Member; Earth and Environmental Sciences;

   Sammanfattning : A palynological study has been conducted on Late Triassic and Early Jurassic outcrop- and borehole sections of the Höganäs and Rya formations, NW Scania. The diverse and generally well preserved palynomorph assemblages can be divided into three miospore zones: (1) the latest Rhaetian-?Hettangian Transitional interval; (2) the Hettangian Pinuspollenites-Trachysporites Zone; and (3) the Sinemurian Cerebropollenites macroverrucosus Zone. LÄS MER