Essays about: "Triassic"

Showing result 11 - 15 of 17 essays containing the word Triassic.

  1. 11. Enigmatic basal archosauromorph from the Late Triassic of Poland

    University essay from Evolution och utvecklingsbiologi; Institutionen för biologisk grundutbildning

    Author : Olja Toljagic; [2012]
    Keywords : ;

    Abstract : Choristodera, a lineage of basal archosauromorphs (Reptilia: Diapsida), first appeared in Early/Middle Jurassic (possibly Late Triassic; approximately 201 million years ago) and extended all the way into early Miocene (approximately 23 million years ago). Choristoderans are the only group of more basal archosauromorphs that survived after the Jurassic period, along with Archosauriformes (a more derived group of Archosauromorphs). READ MORE

  3. 12. Maturity of kerogen, petroleum generation and the application of fossils and organic matter for paleotemperature measurements

    University essay from Lunds universitet/Geologiska institutionen

    Author : Yaser Abdullah Abdullah Al-Mashramah; [2011]
    Keywords : thermal alteration; thermal maturation; kerogen; petroleum generation; paleothermometres; vitrinite; conodonts; graptolites; palynomorphs; Earth and Environmental Sciences;

    Abstract : The origin, composition and maturity of kerogen, and its conversion to petroleum is reviewed. Various methods for estimating the maximum temperature to which kerogen and potential source rocks were subjected are also reviewed. READ MORE

  4. 13. 40Ar/39Ar datering av basalter i Skåne, S Sverige : bevis för två pulser vid 191-178 Ma och vid 110 Ma, samt deras relation till uppsprickning av Pangea

    University essay from Lunds universitet/Geologiska institutionen

    Author : Ingemar Bergelin; [2006]
    Keywords : Skåne; basalt; jura; krita; geokronologi; 40Ar 39Ar; geokemi; Scania; Jurassic; Cretaceous; geochronology; geochemistry; Earth and Environmental Sciences;

    Abstract : Under karbon och perm sammansmälte huvuddelen av jordens kontinenter till en gigantisk landmassa som fått namnet Pangea. Denna blev efterhand instabil och började mot slutet av trias, men framför allt under Jura, att fragmentera i ett antal mindre kontinentala plattor. Detta skedde under omfattande och ibland våldsam vulkanism. READ MORE

  5. 14. An Early Jurassic conifer-dominated assemblage of the Clarence-Moreton Basin, eastern Australia

    University essay from Lunds universitet/Geologiska institutionen

    Author : Ida-Maria Jansson; [2006]
    Keywords : Australia; Jurassic; Marburg Subgroup; conifers; palaeoenvironment; Australien; Jura; barrträd; palaeomiljö; Earth and Environmental Sciences;

    Abstract : During the early Mesozoic two mass-extinction events profoundly reshaped the world’s biota. The first of these took place at the end of the Triassic and affected both marine organisms and terrestrial floras. The second occurred as an oceanic anoxic event during the early Toarcian. READ MORE

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

    University essay from Lunds universitet/Geologiska institutionen

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

    Abstract : 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. READ MORE