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.
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 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 ...
WEBOrdovician specialists representing not only a large(r) variety of fossil groups, but also an increasing panel of other disciplines, including sedimentology, sequence stratigraphy, (isotope) geochemistry, geochronology, and others.
Oxygenation of the Baltoscandian shelf linked to Ordovician ...
WEBOct 12, 2023 · Animal diversification coincided with increasing oxygenation of the Baltoscandian continental shelf from the Early to Middle Ordovician, according to iodine and calcium records.
A short history of the Ordovician System: from overlapping unit ...
WEBThe Ordovician System was introduced by Charles Lapworth as a solution to the overlapping unit stratotypes loosely defined by Adam Sedgwick, for the Cambrian, and Roderick Murchison, for the Silurian. The Ordovician has emerged as one of the longest and most significant of the geological periods.
New Research Suggests Ancient Earth Had Rings - Yahoo
WEB1 day ago · By the time it drew to a close around 440 million years ago, plants had crept out of the ocean and spread across land for the first time, blanketing the world in green. The Earth’s rings are a ...
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