Ordovician Period | Major Events, Extinction, & Facts
WEBAug 9, 2024 · Learn about the Ordovician Period, the second period of the Paleozoic Era, when continents were flooded, sea levels were high, and marine life diversified. Find out how the Ordovician ended with a mass extinction and how it …
Ordovician - Wikipedia
WEBThe Ordovician is a geologic period and system of the Paleozoic Era, spanning 41.6 million years from 485.4 to 443.8 Ma. It was marked by the diversification of life, the first land plants, and the Ordovician–Silurian extinction events.
Ordovician Period - Marine Life, Glaciation, Climate | Britannica
WEBAug 9, 2024 · Ordovician Period - Marine Life, Glaciation, Climate: The rate of seafloor spreading that followed the breakup of the supercontinent Rodinia near the end of the Proterozoic Eon (2.5 billion to 541 million years ago) peaked during the Ordovician Period.
Ordovician Period - Natural History Museum
WEBAug 10, 2012 · Learn about the Ordovician radiation, the greatest increase in marine diversity in the history of life, and the Paleozoic fauna that dominated the seas for 230 million years. Explore the tectonic, climatic, and extinction events that shaped the Ordovician Period.
Ordovician Period Information and Facts - National Geographic
WEBLearn about the marine life and climate of the Ordovician period, 488 to 443 million years ago. See fossils of nautiloids, conodonts, fish, sea lilies, and more.
Ordovician Period - Marine Life, Trilobites, Brachiopods
WEBAug 9, 2024 · Learn about the Ordovician radiation, a period of rapid increase in marine biodiversity and ecological complexity. Explore the fossils and habitats of trilobites, brachiopods, graptolites, and other organisms that dominated the Ordovician seas.
Ordovician Period—485.4 to 443.8 MYA - U.S. National Park Service
WEBApr 28, 2023 · The sea teemed with life different from its Cambrian predecessors such as bivalves, gastropods (snails), bryozoans (moss animals), and crinoids (sea lilies). Bryozoans first appeared in the Ordovician and comprise an important group of colonial, marine organisms that still exist today.
2.10: Ordovician Period (485-444 million years)
WEBFeb 15, 2021 · Shallow seas once again flooded across much of North America through much of the Ordovician Period. Deposition of sediments during this marine transgression resulted in the Tippecanoe Sequence which rests unconformably on top of the Sauk Sequence (see Figure 2.13).
Oxygenation as a driver of the Great Ordovician ... - Nature
WEBNov 20, 2017 · Oxygen isotopes from well-preserved conodont apatite provide proxy evidence for high sea surface temperatures (~40 °C) at the onset of the Ordovician that may have inhibited diversification,...
Prehistoric Life During the Ordovician Period - ThoughtCo
WEBOct 13, 2019 · Learn about the Ordovician period (488-443 million years ago), the second period of the Paleozoic Era. Discover how climate, geography and plate tectonics shaped the diversity and extinction of marine and terrestrial life.
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