Sökning: "trilobiter"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet trilobiter.

  1. 1. Kinematic Enrolment in Four Ordovician Trilobites Using Three-Dimensional Modelling

    Master-uppsats, Uppsala universitet/Paleobiologi

    Författare :Alejandro Corrales Garcia; [2023]
    Nyckelord :3D modelling; Blender; Dysplanus centrotus; enrolment kinematics; Gyrometopus lineatus; Illaenus sarsi; Ordovician; trilobites; Trilobiter; Enrollering; 3D-modellering; Blender; Modelos 3D; Blender; cinematica; enrollamiento; Ordovicico; trilobites;

    Sammanfattning : Trilobites were a successful group of marine arthropods that thrived for much of the Palaeozoic Era. Akey innovation of trilobites involved the capacity to enrol their biomineralized exoskeletons for protection; a trait that appeared early in their evolutionary history during the Cambrian Period. LÄS MER

  3. 2. Paleontology and Sedimentology of the Alum Shale Formation at Björnberget, Västerbotten County, Sweden

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Mannelqvist Alexander; [2016]
    Nyckelord :Brachiopoda; Acrotretida; New species; New locality; Alum Shale Formation; Brachiopoda; Acrotretida; ny art; ny lokal; Alunskifferformationen;

    Sammanfattning : A new locality of the Alum Shale Formation at Björnberget, Västerbotten County, of the lower allochthon of the Caledonian front is described herein. Two new species of acrotretid brachiopods were found. Tingitanella vilhelminia n. sp. LÄS MER

  4. 3. De mellankambriska oelandicuslagren på Öland : stratigrafi och faciestyper

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Johan Malmgren; [2016]
    Nyckelord :Öland; Sverige; kambrium; trilobiter; Acadoparadoxides oelandicus; Ellipsocephalus polytomus; Earth and Environmental Sciences;

    Sammanfattning : The thesis deals with a drill core retrieved from northern Öland, Sweden, in 2010. The length of the core is c. 107 m and comprises an Ordovician and Cambrian succession. The middle Cambrian primarily consists of fossiliferous mudstone with thin siltstone beds. LÄS MER

  5. 4. Study of the Taxonomy and the Inter and Intra Specific Variability of Phacopidae from the Lower Devonian of Algeria: Morphometric Approach and Meaning.

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Gauthier Hainaut; [2015]
    Nyckelord :Paleontology; Trilobite; Devonian; Biometry; Morphometry; Covariance;

    Sammanfattning : An Algerian Phacopid fauna, described by Lemaître in 1952, is reexamined here. Species arereevaluated in order to be in agreement with modern taxonomy. To characterize the size and shape of our specimens, as well as inter- and intraspecific variations, a morphometric analysis was performed. Only holaspids were analyzed. LÄS MER

  7. 5. Den senkambriska alunskiffern i Västergötland — utbredning, mäktigheter och faciestyper

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Frans Lundberg; [2012]
    Nyckelord :agnostider; trilobiter; stratigrafi; furongium; kambrium; alunskiffer; orsten; stratigraphy; trilobites; agnostoids; Torbjörntorp Alum shale; Cambrian; Furongian; Torbjörntorp; Västergötland; Earth and Environmental Sciences;

    Sammanfattning : Populärvetenskaplig sammanfattning: Uråldrig skiffer från Västergötland Alunskiffern i Västergötland är cirka 515–485 miljoner år gammal och avsattes under den geologiska åldern furongium (tidigare överkambrium). Denna skiffer kan delas in i olika zoner baserade i vilken höjd i som fossil kan hittas. LÄS MER