Ordovician: The Ordovician period is an interval of about 44 million years defined on the geologic timescale as spanning roughly from 488 to 444 million years ago (mya) and being noteworthy for both beginning and ending with extinction events, while also ... [100%] 2023-02-04
Ordovician: The Ordovician period is a theorized second period in the theorized Paleozoic era. It is posited that it started approximately 500 million years ago after the end of the theorized Cambrian era. [100%] 2023-02-28 [Geologic Systems]
Ordovician: The Ordovician (/ɔːr.dəˈvɪʃ.i.ən, -doʊ-, -ˈvɪʃ.ən/ or-də-VISH-ee-ən, -doh-, -VISH-ən) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the ... (Second period of the Paleozoic Era 485-444 million years ago) [100%] 2022-07-28 [Ordovician] [Geological periods]...
Ordovician: The Ordovician was the second period of the Paleozoic era and Phanerozoic eon. It lasted from 488 to 443 million years ago (give or take a million year margin of error). [100%] 2023-02-15 [Paleontology]
Ordovician: The Ordovician (/ɔːr.dəˈvɪʃ.i.ən, -doʊ-, -ˈvɪʃ.ən/ or-də-VISH-ee-ən, -doh-, -VISH-ən) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the ... (Earth) [100%] 2022-09-09 [Ordovician] [Geological periods]...
Paleodemography: Paleodemography is the study of human demography in antiquity and prehistory. More specifically, paleodemography looks at the changes in pre-modern populations in order to determine something about the influences on the lifespan and health of earlier peoples. (Earth) [98%] 2023-12-24 [Archaeological science]
Paleontography: Paleontography (from Ancient Greek παλαιός “old”, ὤν "being", γραφή "I write") is the formal description of fossil remains. It is a subdiscipline of paleontology. (Biology) [98%] 2024-09-07 [Subfields of paleontology]
Ordovician System: geology, the group of strata which occur normally between the Cambrian below and the Silurian above; it is here regarded as including in ascending order the Arenig, Llandeilo, and Caradoc or Bala series (qq. Lapworth in 1879 to embrace those ... [70%] 2022-09-02
Ordovician radiation: The Ordovician radiation, or the 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 ... (Earth) [70%] 2023-02-17 [Ordovician events]
Late Ordovician: The Late Ordovician, also called the Upper Ordovician by geologists, is the third epoch of the Ordovician period. At this time, Western and Central Europe and North America collided to form Laurentia, while glaciers built up in Gondwana, which was ... [70%] 2024-11-10 [Ordovician] [Geological epochs]...
Ordovicien supérieur: Cet article est une ébauche concernant la géologie. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. [63%] 2023-10-07
Ordovicien inférieur: Cet article est une ébauche concernant la géologie. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. [63%] 2023-10-25
Ordovicien moyen: Cet article est une ébauche concernant la géologie. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. [63%] 2023-09-17
Late Ordovician glaciation: The Late Ordovician glaciation , also known as the Hirnantian glaciation or end-Ordovician glaciation, is the first part of the Andean-Saharan glaciation. It was centered on the Sahara region in late Ordovician, about 440–460 Ma (million years ago ... (Earth) [57%] 2023-12-27 [Ordovician events] [Late Ordovician extinctions]...
Timeline of Ordovician research: This timeline of Ordovician research is a chronological listing of events in the history of geology and paleontology focused on the study of earth during the span of time lasting from 485.4–443.4 million years ago and the ... (None) [50%] 2023-06-19 [Ordovician] [Paleontology timelines]...
Late Ordovician mass extinction: The Late Ordovician mass extinction, sometimes known as the end-Ordovician mass extinction or Ordovician-Silurian Extinction , is the first of the "big five" major mass extinction events in Earth's history. It is often considered to be the second ... (Biology) [50%] 2022-06-28 [Late Ordovician extinctions]
Cambrian–Ordovician extinction event: The Cambrian–Ordovician extinction event occurred approximately 488 million years ago (m.y.a.). This early Phanerozoic Eon extinction event eliminated many brachiopods and conodonts, and severely reduced the number of trilobite species. (Earth) [50%] 2023-09-30 [Extinction events] [Early Ordovician extinctions]...
Ordovician–Silurian extinction events: The Ordovician–Silurian extinction events, also known as the Late Ordovician mass extinction, are collectively the second-largest of the five major extinction events in Earth's history in terms of percentage of genera that became extinct. Extinction was global ... (Earth) [50%] 2024-01-01 [Extinction events] [Late Ordovician extinctions]...
Great Ordovician Biodiversification Event: The 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 ... (Earth) [50%] 2023-11-20 [Ordovician events]
Late Ordovician mass extinction: The Late Ordovician mass extinction (LOME), sometimes known as the end-Ordovician mass extinction or the Ordovician-Silurian extinction, is the first of the "big five" major mass extinction events in Earth's history, occurring roughly 445 million years ago ... (Extinction event around 444 million years ago) [50%] 2024-07-15 [Extinction events] [History of climate variability and change]...
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