Blar i forfatter "Hammer, Øyvind"

Viser treff 1-4 av 4

    • Bivalve beds reveal rapid changes in ocean oxygenation in the Boreal Middle Triassic – a case study from Svalbard, Norway 

      Engelschiøn, Victoria Sjøholt; Bernhardsen, Sofie; Wesenlund, Fredrik; Hammer, Øyvind; Hurum, Jørn Harald; Mørk, Atle (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-17)
      A fossil-rich interval in the organic-rich marine black mudstone of the Middle Triassic Botneheia Formation on eastern Svalbard was logged in high-resolution on an extremely well exposed section with emphasis on bivalve beds, taphonomic features, trace fossils and oxygenation proxies. The size distribution, fragmentation, articulation and orientation of three bivalve beds of the epifaunal flat ...

    • High-resolution 3D seismic study of pockmarks and shallow fluid flow systems at the Snøhvit hydrocarbon field in the SW Barents Sea 

      Tasianas, Alexandros; Bünz, Stefan; Bellwald, Benjamin; Hammer, Øyvind; Planke, Sverre; Lebedeva-Ivanova, Nina; Krassakis, Pavlos (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-21)
      The Barents Sea is an epicontinental shelf sea with a fragmented structure consisting of long fault complexes, basins and basement highs. Fluid leakage from deep-seated hydrocarbon accumulations is a widespread phenomenon and mostly related to its denudation history during the glacial/interglacial cycles. In this study, we aimed to better understand shallow fluid flow processes that have led to the ...

    • The Slottsmøya marine reptile Lagerstätte: depositional environments, taphonomy and diagenesis 

      Delsett, Lene Liebe; Novis, Linn Kristin; Roberts, Aubrey Jane; Koevoets, Maayke Jacqueline; Hammer, Øyvind; Druckenmiller, Patrick Scott; Hurum, Jørn Harald (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-16)
      The Late Jurassic Slottsmøya Member Lagersta¨tte on Spitsbergen offers a unique opportunity to study the relationships between vertebrate fossil preservation, invertebrate occurrences and depositional environment. In this study, 21 plesiosaurian and 17 ichthyosaur specimens are described with respect to articulation, landing mode, preservation, and possible predation and scavenging. The stratigraphic ...

    • Structure and function of respiratory turbinates in phocid seals 

      Mason, Matthew J.; Wenger, Lea M.D.; Hammer, Øyvind; Blix, Arnoldus S (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-13)
      In terrestrial mammals, the respiratory turbinate bones within the nasal cavity are employed to conserve heat and water. In order to investigate whether environmental temperature affects respiratory turbinate structure in phocids, we used micro-computed tomography to compare maxilloturbinate bone morphology in polar seals, grey seals and monk seals. The maxilloturbinates of polar seals have much ...