Sökning: "trilobites"

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

  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. Cambrian stratigraphy and depositional dynamics based on the Tomten-1 drill core, Falbygden, Västergötland, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Frans Lundberg; [2016]
    Nyckelord :biostratigraphy; Sweden; Västergötland; drill core; agnostoids; trilobites; δ13 excursion DICE ; Cambrian; carbon isotope stratigraphy; Earth and Environmental Sciences;

    Sammanfattning : The Tomten-1 drilling at Torbjörntorp in Västergötland, southern Sweden, penetrated 29.85 m of Cambrian Series 2 and 3, Furongian, and Lower and Middle Ordovician strata. The biostratigraphy, sedimentology and carbon isotope (δ[sup]13[/sup]C[sub]org[/sub]) stratigraphy of the core have been analysed. LÄS MER

  4. 3. 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

  5. 4. 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

  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