Sökning: "Palaeontology"

Hittade 4 uppsatser innehållade ordet Palaeontology.

  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. Study of the Taxonomy of Carnivores from the Eocene-Oligocene of the Quercy Area, France

    Magister-uppsats, Uppsala universitet/Paleobiologi

    Författare :Julien van der Hoek; [2021]
    Nyckelord :Quercy; Carnivora; Amphicyonidae; Eocene; Oligocene; taxonomy;

    Sammanfattning : The Quercy area of France is an important site for mammal palaeontology, yet 19th century collections of this area, such as the one in the Department of Palaeobiology, Naturhistoriska riksmuseet, remain understudied due to not being well updated taxonomically and correlated stratigraphically. An updated taxonomy was created for the postcranial material of the collections, as well as the dental material originally identified to the amphicyonid genera Amphicyon, Haplocyon and Pseudocyon through study of morphological characteristics and measurements. LÄS MER

  4. 3. Testing the Cretaceous Diversity of Ichthyosaurs and Their Extinction Hypotheses Using a Quantitative Approach

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Naz Acikkol; [2015]
    Nyckelord :diversity; ichthyosaurs; extinction; belemnites; ammonites; prey; predator; rock record; sampling bias; Cretaceous; mångfald; utdöende; fisködlor; belemniter; rovdjur; byte;

    Sammanfattning : As portrayed in Before the Dinosaur: the Historical Significance of the Fossil Marine Reptiles, ichthyosaurs, as other Mesozoic marine amniotes, have been unfairly overshadowed by dinosaurs in both popular culture and the field of vertebrate palaeontology. Yet by the effort of dedicated researchers, work on these fish-like marine reptiles had never died out, and in fact a second wave of interest emerged in the late 20th century. LÄS MER

  5. 4. Spectrogram Evaluation of Seismic Risk in Managua, Nicaragua

    Magister-uppsats, Lunds universitet/Teknisk geologi

    Författare :Jonas Hedberg; [2005]
    Nyckelord :Stratigrafi; Stratigraphy; Tektonik; Paleontologi; Palaeontology; geologi; jordbävningar; Geology; MFS; ASDI; SIDA; UNAN; CIGEO; Natural disasters; Frequency analysis; In-situ testing; Geophysical surveying; Geophysics; Soil; Sediment; Surface layers; Dynamic properties; Nakamura; Impedance; Damping; Attenuation; Resonance; Elastic rebound; Faults; Tectonics; Short-term Fourier transform; Earthquake-sensitivity; Local risk; Vulnerability; Time-frequenzy hazard analysis; Spectrogram; Traffic impulse response; Nicaragua; Site response; Managua; Earthquakes; Sedimentology; Sedimentologi; Hydrogeology; geographical and geological engineering; Hydrogeologi; teknisk geologi; teknisk geografi; physical oceanography; meteorology; Geofysik; fysisk oceanografi; meteorologi; Physical geography; geomorphology; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi; Earth and Environmental Sciences;

    Sammanfattning : Managua has experienced two devastating earthquakes during the last century resulting in major human loss. The destruction in the earthquake of 1972 was particularly severe in defined areas of the city, including the former city centre, which is now unused terrain. LÄS MER