Project 653 - The onset of the Great Ordovician Biodiversification Event

IGCP project meeting in 2017

IGCP 653 Workshop: 15-16 May, Nanjing, China-Programme

4th International Conodont Symposium: 25-30 June, University of Valencia, Spain. Theme session “The rise of conodonts prior to and during the Great Ordovician Biodiversification Event” organized by Drs. Ian Percival and Yong Yi Zhen. First circular, 2nd Circular

6th International Conference on Trilobites and their Relatives: 7-10 July, Tallinn, Estonia. GOBE theme session. website

Ordovician Geodynamics: The Sardic Phase in the Pyrenees, Mouthoumet and Montagne Noire massifs.: 4-9 September, Figures, Catalonia. Indoor sessions and field trips to the eastern Pyrenees, Mouthoumet massif, and Montagne Noire. First circular, Second circular

10th Baltic Stratigraphic Conference: 12-14 September, Holy Cross Mountains, Poland. Indoor sessions and field excursions within the Holy Cross Mountains. First circular, Second circular

Dayangcha International Workshop on the Cambrian-Ordovician Boundary (DIWCOB): 20-25 September, Changchun, NE China. Indoor sessions and field workshop. First circular

Main Annual Meeting of IGCP 653: 8-18 October, Yichang, China. Indoor sessions (8-12 Oct.) and field excursions (13-18 Oct.) to the Lower Palaeozoic sections of the South China Platform (Yangtze Platform). website, First circular, Second Circular

Geological Society of America Annual Meeting: 22-25 October, Seattle, Washington, USA. Theme session “The onset of the Great Ordovician Biodiversity Event (GOBE): Testing hypotheses with diverse data sets” organized by Drs. Alycia Stigall and Rebecca Freeman. GSA website, blog post

Brief outline of the project

The ‘Great Ordovician Biodiversification Event’ (GOBE) comprises the rapid diversification of marine organisms during the Ordovician Period. It is now clear that this evolutionary radiation had started in some groups by the late Cambrian and continued for others beyond the end of the Ordovician, with the main bulk of the radiation focussed in the Mid Ordovician DarriwilianStage. However, regardless of the timing of the onset, the GOBE completely modified marine food webs and established modern marine ecosystems for the first time. The project focuses on interdisciplinary investigations, including case studies from globally distributed sites, involving specialists from the fields of, for example, palaeontology, sedimentology, stratigraphy, geochemistry, cosmochemistry, climate modelling, palaeooceanography andpalaeoclimatology, in collaboration with the Subcommission on Ordovician Stratigraphy (ISOS). The results of the project will contribute to the understanding of the triggers and timing of the establishment of modern marine ecosystems and also provide insight on the reasons of the first collapse of these environments which may have led directly to the Late Ordovician mass extinction. The project will involve scientists from all over the world, and through the organization of dedicated workshops, will integrate graduate and doctoral students, in particular from developing countries.

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