Late Ordovician zooplankton maps and the climate of the Early Palaeozoic Icehouse
Thijs R. A. Vandenbroucke, Howard A. Armstrong, Mark Williams, Florentin Paris, Koen Sabbe, Jan A. Zalasiewicz, 2013. "Late Ordovician zooplankton maps and the climate of the Early Palaeozoic Icehouse", Early Palaeozoic Biogeography and Palaeogeography, D. A. T. Harper, T. Servais
Download citation file:
Chitinozoans and graptolites are the main components of preserved Ordovician zooplankton. As with much of the modern plankton, the ‘first-order’ species distributions of Ordovician plankton reflect water masses defined on the basis of sea surface temperatures. For ‘time slices’ of less than a few million years, zooplankton distribution patterns can be used to infer latitudinal sea surface temperature gradients, key palaeoceanographical boundaries and the position of Ordovician climate belts. Here, using two Late Ordovician time intervals – the early Sandbian and Hirnantian – we review how zooplankton distribution patterns identify Late Ordovician cooling and reflect the development of severe icehouse conditions.
Additional information on methods and material is available at: http://www.geolsoc.org.uk/SUP18670