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The Ordovician (/ ɔːr d ə ˈ v ɪ ʃ i. ə n,-d oʊ-,-ˈ v ɪ ʃ ən / or-də-VISH-ee-ən, -doh-, - VISH-ən) [9] is a geologic period and system, the second of six periods of the Paleozoic Era, and the second of twelve periods of the Phanerozoic Eon.
Animals of the Ordovician period Paleontology portal; Subcategories. This category has the following 7 subcategories, out of 7 total. Ordovician animals by continent ...
The Great Ordovician Biodiversification Event (GOBE) was an evolutionary radiation of animal life throughout [1] the Ordovician period, 40 million years after the Cambrian explosion, [2] whereby the distinctive Cambrian fauna fizzled out to be replaced with a Paleozoic fauna rich in suspension feeder and pelagic animals.
Although there was a longer cooling trend in Middle and Lower Ordovician, the most severe and abrupt period of glaciation occurred in the Hirnantian stage, which was bracketed by both pulses of the extinction. [48] The rapid continental glaciation was centered on Gondwana, which was located at the South Pole in the Late Ordovician.
The discovery dates to the Ordovician Period, a 41.6-million-year era during which the oceans were dominated by the ancestors of today’s sea urchins and starfish, and a variety of species known ...
Ordovician animals of Oceania (1 C, 1 P) S. Ordovician animals of South America (1 C, 13 P) This page was last edited on 23 January 2023, at 00:00 (UTC). Text is ...
Cameroceras ("chambered horn") is an extinct genus of endocerid cephalopod which lived in equatorial oceans during the entire Ordovician period. Like other endocerids, it was an orthocone, meaning that its shell was fairly straight and pointed.
Ordovician fish of North America (4 P) M. ... Pages in category "Ordovician animals of North America" The following 14 pages are in this category, out of 14 total.