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- Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.In the Late Ordovician Period of Earth's geologic history, about 450 million years ago, more than 75 percent of marine species perished and Earth scientists have been seeking to discover what caused the extinction. It was the second largest in Earth's history.new.nsf.gov/news/relationship-found-between-anci…Earth’s first major mass extinction could have been triggered by climate change caused by volcanic eruptions, according to a new study. Scientists have previously believed the Late Ordovician event some 450 million years ago was linked to the end of an ice age, resulting in rising sea levels and plummeting oxygen levels in the oceans.www.independent.co.uk/news/science/mass-extinc…
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Late Ordovician mass extinction - Wikipedia
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 (Ma). It is often considered to be the second-largest … See more
Ecological impacts
The Late Ordovician mass extinction followed the Great Ordovician Biodiversification Event (GOBE), one of the largest surges of increasing biodiversity in the geological and … See more• Jacques Veniers, "The end-Ordovician extinction event": abstract of Hallam and Wignall, 1997. See more
The first pulse of the Late Ordovician Extinction has typically been attributed to the Late Ordovician Glaciation, which is unusual among mass extinctions and has made LOME an … See more
Metal poisoning
Toxic metals on the ocean floor may have dissolved into the water when the oceans' oxygen was depleted. An increase in available nutrients in the oceans may have been a factor, and decreased ocean circulation caused … See more• Gradstein, Felix M.; Ogg, James G.; Smith, Alan G. (2004). A Geological Time Scale 2004 (3rd ed.). Cambridge University Press: … See more
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Timeline of the evolution of life on Earth | New Scientist
Timeline of the evolutionary history of life - Wikipedia
Timeline of the evolutionary history of life - Wikipedia. The represents the current scientific theory outlining the major events during the development of life on planet Earth. Dates in this article are consensus estimates based on scientific …
A 485-million-year history of Earth’s surface temperature
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How Deadly Would a Nearby Gamma Ray Burst Be?
Nov 8, 2016 · The Ordovician extinction — one of the “big five” in Earth’s history — occurred around 450 million years ago when the population of marine species plummeted. Evidence suggests that this occurred during an ice age and a …
Rodinia | Formation, Breakup, & Facts | Britannica
Rodinia, in geologic time, a supercontinent that incorporated almost all the landmasses on Earth for about 450 million years during the Proterozoic Eon (2.5 billion to 541 million years ago). Rodinia, which was made up of an …
A 500-million-year survey of Earth's climate reveals …
May 22, 2019 · The results match his existing oxygen-isotope measures, and they tell a startling story, he and Henkes reported last year in Earth & Planetary Science Letters. Some 450 million years ago, ocean waters averaged 35°C to …
Ordovician–Silurian true polar wander as a mechanism for severe ...
Ancient Earth globe - Dinosaur
Interactive Map "Ancient Earth" Shows Earth Over …
Sep 13, 2020 · New York City pinned on the Ancient Earth interactive map set to 430 million years ago. Many useful features make the interactive map easy to use, including removing clouds and zooming for a closer look.
Evidence suggesting that earth had a ring in the Ordovician
Shark evolution: a 450 million year timeline - Natural History …
Hirnantian glaciation - Wikipedia
Here's What did Ancient Earth Look Like - Our Planet
450 million years ago, Earth’s magnetic field almost collapsed — …
The World's Mass Extinction Events, Explained | Earth.Org
Mass extinction 450 million years ago 'triggered by volcanic …
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Relationship Found Between Ancient Climate Change and Mass …
The 5 mass extinction events that shaped the history of Earth — …