Christian Mac Ørum Rasmussen

Christian Mac Ørum Rasmussen

Special Consultant

  • Section for Geobiology

    Øster Voldgade 5-7

    1350 København K

    Phone: +45 35 32 23 57
ORCID: 0000-0003-2982-9931

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  1. Published

    Zooming in on the GOBE – 2020 Virtual Annual Meeting of IGCP 653: Abstracts and programme

    Rasmussen, Christian Mac Ørum (ed.), Stigall, A. L. (ed.), Nielsen, Arne Thorshøj (ed.), Stouge, Svend (ed.) & Schovsbo, N. H. (ed.), 2020, Copenhagen: Geological Survey of Denmark and Greenland (GEUS). 54 p. (Danmarks og Grønlands Geologiske Undersøgelse Rapport; No. 21, Vol. 2020).

    Research output: Book/Report › Report › Research

  2. Published

    Was the Late Ordovician mass extinction truly exceptional?

    Rasmussen, Christian Mac Ørum, Vandenbroucke, T. R. A., Nogues, David Bravo & Finnegan, S., 2023, In: Trends in Ecology and Evolution. 38, 9, p. 812-821 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    Was SW Alaska part of Baltica in the Late Ordovician?

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2007, Ikke angivet. Ebbestad, J. O. R., Wickström, L. M. & Högström, A. E. S. (eds.). Geological Survey of Sweden, p. 103-104 1 p. (SGU Rapporter och meddelanden, Vol. 128).

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  4. Published

    Warm-water Tcherskidium fauna (Brachiopoda) in the Late Ordovician Northern Hemisphere of Laurentia and peri-Laurentia

    Jin, J., Blodgett, R. B., Harper, D. A. T. & Rasmussen, Christian Mac Ørum, 2022, In: Journal of Paleontology. 96, 6, p. 1461-1478 18 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. E-pub ahead of print

    Upper Ordovician carbon isotope chemostratigraphy and a high-resolution assessment of the Hirnantian Stage in the Baltic Sea subsurface

    Gunnarsson, N., Calner, M., Rasmussen, Christian Mac Ørum, Wu, R., Lehnert, O. & Dahlqvist, P., 2024, (E-pub ahead of print) In: GFF. 31 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    Upper Cambrian to Upper Ordovician δ13C and δ18O stratigraphy of the western Baltic palaeobasin, Öland, Sweden: A closer look at climate during the onset of the Ordovician Radiation

    Edward, O., Korte, Christoph, Ullmann, C. V., Colmenar, J., Nielsen, M., Stouge, Svend & Rasmussen, Christian Mac Ørum, 2017, p. A-389.

    Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

  7. Published

    Unravelling a Late Ordovician pentameride (Brachiopoda) hotspot from the Boda Limestone, Siljan district, central Sweden

    Rasmussen, Christian Mac Ørum, Ebbestad, J. O. R. & Harper, D. A. T., 2010, In: GFF. 132, 3-4, p. 133-152 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Transgressive-regressive events and facies through the Upper Ordovician– Lower Silurian of Peary Land, North Greenland

    Harper, D. A. T., Rasmussen, Christian Mac Ørum, Munnecke, A., Jin, J., Stouge, Svend & Rasmussen, Jan Audun Liljeroth, 2012, Geophysical Research Abstracts 14, EGU2012-13528, 2012. 2012 ed. Vol. 14. 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research › peer-review

  9. Published

    Tracking brachiopod bioevents in the lower middle Ordovician (Kundan) of Baltica.

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2005, In: Insight. 2, p. 27 1 p.

    Research output: Contribution to journal › Journal article › Research

  10. Published

    Towards a calibrated astronomical timescale for the Mid Ordovician

    Rasmussen, Christian Mac Ørum, Thibault, Nicolas Rudolph, Stouge, Svend, Siggaard-Andersen, M. L., Costa, M., Schovsbo, N., Calner, M., Dahlqvist, P., Korte, Christoph, Frei, Robert, Storey, M., Connelly, J., Pedersen, G. K., Rasmussen, B. W., Rasmussen, J. A. & Nielsen, A. T., 2016, p. 2812 .

    Research output: Contribution to conference › Conference abstract for conference › Research

  11. Published

    The onset of the 'Ordovician Plankton Revolution' in the late Cambrian

    Servais, T., Perrier, V., Danelian, T., Klug, C., Martin, R., Munnecke, A., Nowak, H., Nützel, A., Vandenbroucke, T. R. A., Williams, M. & Rasmussen, Christian Mac Ørum, 2016, In: Palaeogeography, Palaeoclimatology, Palaeoecology - An International Journal for the Geo-Sciences. 458, p. 12-28 17 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    The glacially induced Middle Ordovician rise of the Plectambonitoidea (Brachiopoda) and the phylogenetic placement of the Baltic genus Ukoa

    Rasmussen, Christian Mac Ørum & Pedersen, M., 15 Nov 2019, In: Palaeogeography, Palaeoclimatology, Palaeoecology. 534, 14 p., 109319.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    The evolutionary dynamics of the early Palaeozoic marine biodiversity accumulation

    Kröger, B., Franeck, F. & Rasmussen, Christian Mac Ørum, 2019, In: Proceedings of the Royal Society B: Biological Sciences. 286, 1909, 6 p., 20191634.

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    The detailed Middle to early Late Ordovician faunal succession and δ13Ccarbon chemistry of the Kårehamn drill core, offshore eastern Öland, Sweden: implications for stratigraphy and correlation

    Stouge, Svend, Bagnoli, G., Bauert, G., Bauert, H. & Rasmussen, Christian Mac Ørum, 2023, In: Estonian Journal of Earth Sciences. 72, 1, p. 159

    Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

  15. Published

    The Otta brachiopod fauna: Palaeogeography of early Palaeozoic terranes and biotas across Baltoscandia.

    Harper, D. A. T., Bruton, D. L. & Rasmussen, Christian Mac Ørum, 2005, Abstracts, Fifth International Brachiopod Congress. København: Geological Survey of Greenland, p. 15 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Preface/postscript › Research

  16. Published

    The Otta brachiopod and trilobite fauna: palaeogeography of Early Palaeozoic terranes and biotas across Baltoscandia

    Harper, D. A. T., Bruton, D. L. & Rasmussen, Christian Mac Ørum, 2008, In: Fossils and Strata. 54, p. 31-40 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    The Ordovician – Silurian pentameroid seas of North Greenland: tropical incumbents rule the waves

    Harper, D. A. T., Jin, J., Rasmussen, Christian Mac Ørum, Rasmussen, Jan Audun Liljeroth, Stouge, Svend & Svennevig, K., 2007, In: Palaeontological Association, Newsletter. 66, p. 56 1 p.

    Research output: Contribution to journal › Conference abstract in journal › Research

  18. Published

    The Ordovician of Scandinavia: a revised regional stage classification

    Nielsen, Arne Thorshøj, Ahlberg, P., Ebbestad, J. O. R., Hammer, Ø., Harper, D. A. T., Lindskog, A., Rasmussen, Christian Mac Ørum & Stouge, Svend, 2023, In: Geological Society, London, Special Publications. 532, p. 267-315

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    The Ordovician System in Greenland

    Stouge, Svend, Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2023, In: Geological Society, London, Special Publications. 533, 1, p. 27-64

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    The Kunda (early Mid Ordovician) brachiopod fauna from Western Russia: data from Putilovo Quarry

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2004, WOGOGOB-2004 8th Meeting of the Working Group on the Ordovician Geology of Baltoscandia, Tallinn and Tartu. 1 ed. Estonia, p. 87 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Preface/postscript › Research

  21. Published

    The Hirnantian Stage and the Hirnantian Isotope Carbon Excursion (HICE) in the Gotland (Sweden) subsurface

    Gunnarsson, N., Calner, M., Wu, R., Rasmussen, Christian Mac Ørum, Lehnert, O., Erlström, M. & Dahlqvist, P., 2022, Geological Society of Sweden 150 Year Anniversary Meeting: Abstract volume. Weihed, J. B., Johansson, Å. & Rehnström, E. (eds.). Geologiska Föreningen, p. 320-321 (Geoglogiska Föreningen Specialpublikation, Vol. 1).

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  22. Published

    Tectonics, islands and island hopping in the Early Palaeozoic benthos

    Harper, D. A. T., Liljeroth, M. & Rasmussen, Christian Mac Ørum, 2011, In: Scripta Geologica. 142, p. 11-12 2 p.

    Research output: Contribution to journal › Conference abstract in journal › Research

  23. Published

    Synchronizing rock clocks in the late Cambrian

    Zhao, Zhengfu, Thibault, Nicolas Rudolph, Dahl, Tais Wittchen, Schovsbo, N. H., Sørensen, A. L., Rasmussen, Christian Mac Ørum & Nielsen, Arne Thorshøj, 2022, In: Nature Communications. 13, 11 p., 1990.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Synchronizing Rock Clocks in the Cambrian

    Zhao, Zhengfu, Thibault, Nicolas Rudolph, Dahl, Tais Wittchen, Schovsbo, N. H., Sørensen, A. L., Rasmussen, Christian Mac Ørum & Nielsen, Arne Thorshøj, 2021. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  25. Published

    Sulfidic anoxia in the oceans during the Late Ordovician mass extinctions – insights from molybdenum and uranium isotopic global redox proxies

    Dahl, Tais Wittchen, Hammarlund, E. U., Rasmussen, Christian Mac Ørum, Bond, D. P. G. & Canfield, D. E., 2021, In: Earth-Science Reviews. 220, 14 p., 103748.

    Research output: Contribution to journal › Review › Research › peer-review

  26. Published

    Sulcipentamerus (Pentamerida, Brachiopoda) from the Lower Silurian Washington Land Group, North Greenland

    Jin, J., Harper, D. A. T. & Rasmussen, Christian Mac Ørum, 2009, In: Palaeontology. 52, p. 385-399 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    Subaerial speleothems and deep karst in central Sweden linked to Hirnantian glaciations

    Kröger, B., Ebbestad, J. O. R., Lehnert, O., Ullmann, C. V., Korte, Christoph, Frei, Robert & Rasmussen, Christian Mac Ørum, 2015, In: Journal of the Geological Society - London. 172, 3, p. 349-356 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. Published

    Stable ocean redox during the main phase of the Great Ordovician Biodiversification Event

    del Rey, Álvaro, Rasmussen, Christian Mac Ørum, Calner, M., Wu, R., Asael, D. & Dahl, Tais Wittchen, 2022, In: Communications Earth & Environment. 3, 7 p., 220.

    Research output: Contribution to journal › Journal article › Research › peer-review

  29. Published

    Special Issue: Across the Great Ordovician Biodiversification Event (GOBE): Advances in understanding the co-evolution Earth-life system from the late Cambrian through the Katian

    Stigall, A., Edwards, C. T., Freeman, R. L. & Rasmussen, Christian Mac Ørum, 2019, Elsevier.

    Research output: Other contribution › Research

  30. Published

    So where did they go? Brachiopod refuges during the End Ordovician crisis interval

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2009, Ikke angivet. Harper, D. A. T. & McCorry, M. (eds.). Museum Tusculanum, p. 15 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  31. Published

    Resolving early Mid-Ordovician (Kundan) bioevents in the East Baltic based on brachiopods

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2008, In: Geobios. 41, 4, p. 533-542

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    Refined Ordovician timescale reveals no link between asteroid breakup and biodiversification

    Lindskog, A., Canas Portela Costa, M. M., Rasmussen, Christian Mac Ørum, Connelly, James & Eriksson, M. E., 24 Jan 2017, In: Nature Communications. 8, 8 p., 14066.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    Reclaiming the tropical shores of Laurentia: the early Silurian pentameroid (r)evolution

    Rasmussen, Christian Mac Ørum, Sep 2011, In: G F F. 133, 1-2, p. 70-71 2 p.

    Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

  34. Published

    På fossiljagt i Andesbjergenes rødder: et bidrag til rekonstruktion af fortidens geografi

    Stemmerik, L., Harper, D. A. T., Rasmussen, Jan Audun Liljeroth, Rasmussen, Christian Mac Ørum & Pincda, G. A. H., 2008, In: Geografisk Orientering. 38, 1, p. 428-432

    Research output: Contribution to journal › Journal article › Communication

  35. Published

    Precisely locating the Ordovician equator in Laurentia

    Jin, J., Harper, D. A. T., Cocks, L. R. M., McCausland, P. J. A., Rasmussen, Christian Mac Ørum & Sheehan, P. M., Feb 2013, In: Geology. 41, 2, p. 107-110 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. Phylogeography of Ordovician-Silurian rhynchonelliformean brachiopods: tracking higher order distributional patterns, radiations and extinctions in 4D

    Rasmussen, Christian Mac Ørum, 2014, In: GFF. 136, 1, p. 223-228 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  37. Published

    Overview of the pentameride brachiopod succession (upper Ordovician – lower Silurian) in Børglum Elv and G.B. Schley Fjord, Peary Land, North Greenland

    Harper, D. A. T., Jin, J., Rasmussen, Christian Mac Ørum, Rasmussen, Jan Audun Liljeroth & Stouge, Svend, 2007, Acta Palaeontologica Sinica. Nanjing, Vol. 46 supplement. p. 176 – 180 5 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  38. Published

    Onset of main Phanerozoic marine radiation sparked by emerging Mid Ordovician icehouse

    Rasmussen, Christian Mac Ørum, Ullmann, C. V., Jakobsen, K. G., Lindskog, A., Hansen, J., Hansen, T., Eriksson, M. E., Dronov, A., Frei, Robert, Korte, Christoph, Nielsen, Arne Thorshøj & Harper, D. A. T., 2016, In: Scientific Reports. 6, 9 p., 18884.

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. Published

    Occurrence of the Late Ordovician Red River lithofacies and biofacies in North Greenland.

    Jin, J., Harper, D. A. T., Rasmussen, Jan Audun Liljeroth, Rasmussen, Christian Mac Ørum & Stouge, Svend, 2008, In: Canadian Paleontology Conference Proceedings. 6, p. 18-21 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  40. Published

    Middle Ordovician carbonate facies development, conodont biostratigraphy and faunal diversity patterns at the Lynna River, northwestern Russia

    Lindskog, A., Eriksson, M. E., Rasmussen, J. A., Dronov, A. & Rasmussen, Christian Mac Ørum, 2020, In: Estonian Journal of Earth Sciences. 69, 1, p. 37-61

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. Published

    Middle Ordovician astrochronology decouples asteroid breakup from glacially-induced biotic radiations

    Rasmussen, Jan Audun Liljeroth, Thibault, Nicolas Rudolph & Rasmussen, Christian Mac Ørum, Dec 2021, In: Nature Communications. 12, 1, 14 p., 6430.

    Research output: Contribution to journal › Journal article › Research › peer-review

  42. Late Ordovician carbonate mounds from North Greenland: a peri-Laurentian dimension to the Boda Event?

    Harper, D. A. T., Jin, J. & Rasmussen, Christian Mac Ørum, 2014, In: GFF. 136, 1, p. 95-99 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    Late Ordovician brachiopods from eastern North Greenland: equatorial offshore migration of the Red River fauna

    Rasmussen, Christian Mac Ørum, Mar 2013, In: Palaeontology. 56, 2, p. 359-379 21 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. Published

    Late Ordovician brachiopods from West-central Alaska: systematics, ecology and palaeobiogeography

    Rasmussen, Christian Mac Ørum, Harper, D. A. T. & Blodgett, R. B., 2012, Wiley-Blackwell. 103 p. (Fossils and Strata, Vol. 58).

    Research output: Book/Report › Book › Research › peer-review

  45. Published

    Late Ordovician and early Silurian virgianid and stricklandioid brachiopods from North Greenland: implications for a warm-water faunal province

    Jin, J., Rasmussen, Christian Mac Ørum, Sheehan, P. M. & Harper, D. A. T., 2024, In: Papers in Palaeontology. 10, 1, 42 p., e1544.

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. Published

    Kundan (early Mid Ordovician) brachiopods from the Baltic: biostratigraphy and ecostratigraphy.

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2005, In: GFF. 127, p. 54 1 p.

    Research output: Contribution to journal › Journal article › Research

  47. Published

    Interrogation of distributional data for the End Ordovician crisis interval: where did disaster strike?

    Rasmussen, Christian Mac Ørum & Harper, D. A. T., 2011, In: Geological Journal. 46, 5, p. 478-500 23 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  48. Published

    Integrating bed-by-bed palaeobiological and geochemical proxies through the onset of the Great Ordovician Biodiversification Event on Baltica

    Rasmussen, Christian Mac Ørum, Ullmann, C. V., Jakobsen, K. G., Lindskog, A., Hansen, J., Hansen, T., Eriksson, M. E., Dronov, A., Frei, Robert, Korte, Christoph, Nielsen, Arne Thorshøj & Harper, D. A. T., 2014, p. 81.

    Research output: Contribution to conference › Conference abstract for conference › Research

  49. Published

    Identifying the most surprising victims of mass extinction events: an example using Late Ordovician brachiopods

    Finnegan, S., Rasmussen, Christian Mac Ørum & Harper, D. A. T., Sep 2017, In: Biology Letters. 13, 9, 5 p., 20170400.

    Research output: Contribution to journal › Letter › Research › peer-review

  50. Published

    Gamma-ray log correlation and stratigraphic architecture of the Cambro-Ordovician Alum Shale Formation on Bornholm, Denmark: Evidence for differential syndepositional isostasy

    Nielsen, Arne Thorshøj, Schovsbo, N. H., Klitten, K., Woollhead, D. & Rasmussen, Christian Mac Ørum, 2018, In: Bulletin of the Geological Society of Denmark. 66, p. 237-273 18 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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