Our group will give several presentation at the Nordic Winter Meeting at DTU in Lyngby, Denmark Wednesday Jan 10, 2018 10.00-11.00 Student poster presentations Magnus A. R, Harding “Surface analyses of fossil leaves” Julius C. Havsteen “The Silurian Lau event – testing plant weathering as driver for ocean anoxia and animal extinction” Thursday Jan 11, […]
Beginning in January 2018, Magnus A. R. Harding will continue working in the group now as a research assistant. Magnus’ main focus will be to extend ongoing studies of the chemical composition of fossil plant leaves.
A new paper on the redox conditions in the oceans after the Sturtian and before the Marinoan ‘Snowball’ glaciations is now press in Precambrian Research. Our results suggest that oceans remained largely anoxic after the Sturtian glaciation and that something else triggered oxygenation of the Ediacaran oceans after the Marinoan glaciation. This ‘something’ could be due to the way animals affect the global […]
MSc Geology student Julius C. Havsteen starts his thesis project in January 2018, where he will be exploring changes in the the globally integrated ocean oxygenation state during the Silurian Lau event. The Lau event is the largest carbon isotope excursion in the Phanerozoic, recording a brief period of dramatic changes in the Earth system. Nevertheless, the driving […]
Magnus Harding obtained this picture of the element distribution in a ~60 million year old plant fossil (Taxodium or Sequoia) using TOF-SIMS on a specimen from the Natural History Museum of Denmark collections. The graphics was awarded the annual Art in Science Award 2017for “the best scientific explanation”. Here is a photo from the award show.
One of the big mysteries in the history of life is why it took so long time for complex organisms to evolve. The Earth is 4.5 billion years old and fossils of the first motile animals are ca. 555 million years old. It took 3,945,000,000 years or almost 4 million millennia before evolution in mostly microbial ecosystems evolved organisms with a capacity to […]
Friedrich-Alexander Universitat Erlangen-Nurnberg have arranged an old fashioned expedition with the three-masted scooner, Thor Heyerdahl. The cruise will bring together scientists from a wide range of fields and from countries around the Baltic Sea. Tais will attend the cruise along with geologists from Germany and the UK on the first leg fra Malmø (Sweden) to Riga (Latvia) from July 18-25. […]
Publication: Brief oxygenation event during the Cambrian explosion linked to a reorganization of the marine biogeochemical cycles – might be animal-driven
A recent article published in Geochemical Perspectives Letters, we present carbon, sulfur and uranium isotope data from Siberian limestone sections straddling the Cambrian Stage 2–3 boundary (Tommotian-Atdabanian) 521–519 million years ago. We discovered a new type of oceanic event where enhanced marine organic carbon and pyrite burial coincides with a more oxygenated ocean state. The event was relative brief, […]