Essays about: "Rhaetian"

Found 5 essays containing the word Rhaetian.

  1. 1. Oolites from the Arabian platform: Archives for the aftermath of the end-Triassic mass extinction

    University essay from Lunds universitet/Geologiska institutionen

    Author : Johannes Greiff; [2021]
    Keywords : sedimentology; carbonates; geochemistry; oolites; ooids; thrombolites; microbialites; Triassic; Jurassic; Hettangian; extinction; United Arab Emirates; Wadi Ghalilah; Wadi Milaha; Earth and Environmental Sciences;

    Abstract : The end-Triassic mass extinction (ETME) which occurred around 201 Ma is known as one of “the big five” mass extinction events of the Phanerozoic eon. Its effects were most severe on marine ecosystems, resulting in a global decline of invertebrate taxa and the complete extinction of the conodonts. READ MORE

  2. 2. Dynamics of Selachian (Shark) Dental Morphology During the Early Mesozoic

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Alexander Paxinos; [2017]
    Keywords : Early Mesozoic; Selachii; morphological disparity; geometric morphometrics; early radiation; Tidig Mesozoisk; Selachimorpha; morfologisk disparitet; geometrisk morfometri; tidig strålning;

    Abstract : The ancestors of all modern day sharks and rays (Neoselachii) may have appeared during the Late Palaeozoic, but their major diversification happened sometime during the Early Mesozoic. Taxonomic evidence places the first neoselachian diversification in the Early Jurassic. READ MORE

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

    University essay from Lunds universitet/Geologiska institutionen

    Author : Samer Bou Daher; [2012]
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 4. Enigmatic basal archosauromorph from the Late Triassic of Poland

    University essay from Uppsala universitet/Uppsala universitet/Evolution och utvecklingsbiologiInstitutionen 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

  5. 5. 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