Ordovician News
WEBThe Ordovician News is a newsletter of the Subcommission on Ordovician Stratigraphy. Compiled annually, it contains subcommission’s report on activities, discussion on Ordovician stratigraphy, data on current research and publications, list of people involved in Ordovician research, meeting announcements etc. Relevant contributions should be ...
International Commission on Stratigraphy
WEBThe annual Ordovician News provides an in-depth overview of the activities of members of our community and contact information to facilitate strengthing scientific connections. See the latest issue and the backlog of the Ordovician News page.
Earth once wore a Saturn-like ring, study of ancient craters …
WEB3 days ago · The Ordovician was a tumultuous time for our planet — it was one of the coldest periods in the last 500 million years and saw a dramatic uptick in the rate of meteorites striking Earth.
Earth had Saturn-like rings 466 million years ago, new ... - Yahoo News
WEB1 day ago · That's according to a fresh analysis of 21 crater sites around the world that researchers suspect were all created by falling debris from a large asteroid between 488 million and 443 million years ago, an era in Earth's history known as the Ordovician during which our planet witnessed dramatically increased asteroid impacts.. A team led by Andy Tomkins, a professor of planetary science at ...
Did Earth Once Have a Ring Like Saturn ... - Smithsonian Magazine
WEB15 hours ago · The first clue came from a series of 21 craters that formed during a roughly 40-million-year period of intense meteorite impact known as the Ordovician impact spike.
Ordovician–Silurian true polar wander as a mechanism for severe ...
WEBDec 26, 2022 · The Ordovician–Silurian transition experienced severe, but enigmatic, glaciation, as well as a paradoxical combination of mass extinction and species origination.
Late Ordovician mass extinction - Wikipedia
WEBThe 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). [1] It is often considered to be the second-largest known extinction event just behind the end-Permian mass extinction, in terms of ...
Late Ordovician climate change and extinctions driven by …
WEBDec 2, 2021 · Increased volcanism-related phosphorus delivery to the Late Ordovician ocean helps explain widespread cooling and eutrophication-driven extinctions, as shown by a biogeochemical model ...
The Cabrières Biota (France) provides insights into Ordovician …
WEBFeb 9, 2024 · The discovery of the Cabrières Biota expands the range of preserved tissue types found in the Ordovician of Montagne Noire, revealing entirely soft taxonomic groups such as algae and non ...
The Ordovician System: Key concepts, events and its distribution …
WEBThe Ordovician was a key period in the biological and geological history of the planet. ‘A Global Synthesis of the Ordovician System’ is presented in two volumes of The Geological Society, Special Publications.