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Bookmark or Share- Ordovician Period | Major Events, Extinction, & Facts ...Ordovician Period, in geologic time, the second period of the Paleozoic Era. It began 485.4 million years ago and ended 443.8 million years ago. The interval was a time of intense diversification (an increase in the number of species) of marine animal life in what became known as the Ordovician radiation.
- Great Ordovician Biodiversification Event - WikipediaThe Great Ordovician Biodiversification Event (GOBE), was an evolutionary radiation of animal life throughout the Ordovician period, 40 million years after the Cambrian explosion, whereby the distinctive Cambrian fauna fizzled out to be replaced with a Paleozoic fauna rich in suspension feeder and pelagic animals.
- The Ordovician Radiation: Macroevolutionary Crossroads of the ...This chapter seeks to document the features and uniqueness of the Ordovician Radiation with respect to its effects on diversity at all levels and to review the gamut of mechanisms suggested as causes of the Ordovician Radiation.
- Oxygenation as a driver of the Great Ordovician ... - NatureThe largest radiation of Phanerozoic marine animal life quadrupled genus-level diversity towards the end of the Ordovician Period about 450 million years ago.
- Editorial Preface to Special Issue: The radiations within the ...The Ordovician biodiversification: radiation and radiations. Two major radiations (Palaeozoic and Mesozoic-Cenozoic) in the marine realm have been visible in almost all the biodiversity curves produced for over a century.
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