All Stories

  1. Coral-based climate records from tropical South Atlantic: 2009/2010 ENSO event in C and O isotopes from Porites corals (Rocas Atoll, Brazil)

    Article • December 2015, FapUNIFESP (SciELO)

    Dr Clemens Vinzenz Ullmann, Dr Ruy Kenji P Kikuchi

  2. Oxygen and carbon isotope and Sr/Ca signatures of high-latitude Permian to Jurassic calcite fossils from New Zealand and New Caledonia

    Article • Gondwana Research, November 2015, Elsevier

    Dr Clemens Vinzenz Ullmann

  3. Geochemical signatures of the early Campanian belemnite Belemnellocamax mammillatus from the Kristianstad Basin in Scania, Sweden

    Article • Palaeogeography Palaeoclimatology Palaeoecology, September 2015, Elsevier

    Dr Clemens Vinzenz Ullmann

  4. Interlaboratory comparison of magnesium isotopic compositions of 12 felsic to ultramafic igneous rock standards analyzed by MC-ICPMS

    Article • Geochemistry Geophysics Geosystems, September 2015, American Geophysical Union (AGU)

    Dr Clemens Vinzenz Ullmann

  5. Chemical and isotopic architecture of the belemnite rostrum

    Article • Geochimica et Cosmochimica Acta, June 2015, Elsevier

    Dr Clemens Vinzenz Ullmann

  6. Diagenetic alteration in low-Mg calcite from macrofossils: a review

    Article • Geological Quarterly, January 2015, Polish Geological Institute

    Dr Clemens Vinzenz Ullmann

  7. Geochemical signatures in Late Triassic brachiopods from New Caledonia

    Article • New Zealand Journal of Geology and Geophysics, October 2014, Taylor & Francis

    Dr Clemens Vinzenz Ullmann

  8. Discrepancy between Sr isotope and biostratigraphic datings of the upper middle and upper Miocene successions (Eastern North Sea Basin, Denmark)

    Article • Palaeogeography Palaeoclimatology Palaeoecology, October 2014, Elsevier

    Dr Clemens Vinzenz Ullmann

  9. Effect of a Jurassic oceanic anoxic event on belemnite ecology and evolution

    Article • Proceedings of the National Academy of Sciences, June 2014, Proceedings of the National Academy of Sciences

    Dr Clemens Vinzenz Ullmann

  10. Partial diagenetic overprint of Late Jurassic belemnites from New Zealand: Implications for the preservation potential of δ7Li values in calcite fossils

    Article • Geochimica et Cosmochimica Acta, November 2013, Elsevier

    Dr Clemens Vinzenz Ullmann

  11. Tectonic forcing of Early to Middle Jurassic seawater Sr/Ca

    Article • Geology, October 2013, Geological Society of America

    Dr Clemens Vinzenz Ullmann

  12. The Giant Pacific Oyster (Crassostrea gigas) as a modern analog for fossil ostreoids: Isotopic (Ca, O, C) and elemental (Mg/Ca, Sr/Ca, Mn/Ca) proxies

    Article • Geochemistry Geophysics Geosystems, October 2013, American Geophysical Union (AGU)

    Dr Clemens Vinzenz Ullmann

  13. Oxygen isotope fluctuations in a modern North Sea oyster (Crassostrea gigas) compared with annual variations in seawater temperature: Implications for palaeoclimate studies

    Article • Chemical Geology, October 2010, Elsevier

    Dr Clemens Vinzenz Ullmann