Ordovician - Wikipedia
The Ordovician (/ ɔːrdəˈvɪʃi.ən, - doʊ -, - ˈvɪʃən / 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 …
Ordovician Period | Major Events, Extinction, & Facts | Britannica
Dec 24, 2024 · 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 …
Ordovician Period Information and Facts - National Geographic
During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast seas and the first primitive plants began to appear on land—before the second largest...
Ordovician Period—485.4 to 443.8 MYA - U.S. National Park Service
Apr 28, 2023 · Rocks from the Ordovician Period contain evidence that plants began colonizing dry land at this time. Most experts agree that the ancestors of land plants first evolved in a …
The End-Ordovician Mass Extinction Wiped Out 85 Percent of Life
Sep 12, 2022 · Long before the dawn of humans, dinosaurs, insects or even trees, a cascade of unfortunate events threatened to end life on earth. During the Ordovician Period, around 485 …
Ordovician Period: Facts, Information, and Timeline - A-Z Animals
Jan 23, 2023 · The Ordovician Period is the second period of the Paleozoic Era (the first and longest era of the Phanerozoic eon). The era began about 541 million years ago with the …
Ordovician Period - Marine Life, Climate Change, Extinction
Dec 24, 2024 · Ordovician Period - Marine Life, Climate Change, Extinction: Numerical climate models as well as carbon isotope measurements from preserved Ordovician soils suggest that …
Ordovician-Silurian extinction | Overview & Facts | Britannica
The Ordovician-Silurian extinction was almost twice as severe as the K–T extinction event that occurred at the end of the Cretaceous Period, about 66 million years ago, which is famous for …
The Ordovician Period - Paleontology World
The Ordovician is best known for its diverse marine invertebrates, including graptolites, trilobites, brachiopods, and the conodonts (early vertebrates). A typical marine community consisted of …
Prehistoric Life During the Ordovician Period - ThoughtCo
Oct 13, 2019 · The Ordovician is the second period of the Paleozoic Era (542-250 million years ago), preceded by the Cambrian and succeeded by the Silurian, Devonian, Carboniferous and …
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