The extinction event abruptly affected all major taxonomic groups and caused the disappearance of one third of all brachiopod and bryozoan families, as well as ...

12 нояб. 2024 г. · Ordovician-Silurian extinction (about 443.8 million years ago), which eliminated about 25 percent of marine families and 85 percent of marine ...

The extinction at the end of the Ordovician Period is the oldest of the "Big Five." Animals had not yet conquered land at this time so the extinction was ...

18 мая 2020 г. · The Ordovician saw major diversification in marine life abruptly terminated by the Late Ordovician mass extinction (LOME).

The Late Ordovician Mass Extinction was the earliest of the 'big' five extinction events and the earliest to affect the trajectory of metazoan life.

The first of the five great mass extinctions occurred during the Late Ordovician, approximately 445 million years ago (Ma). At that time there were few, if any, ...

12 сент. 2022 г. · 85 percent of species went extinct over the relatively short interval of 1.4 million years. This unprecedented die-off is now known as the earth's first mass ...

1 мая 2001 г. · Near the end of the Late Ordovician, in the first of five mass extinctions in the Phanerozoic, about 85% of marine species died.

While the causes of Late Ordovician extinction have not been fully agreed upon, nor will they for some time, the team's study rules out changes in oxygenation ...

28 апр. 2023 г. · This extinction is the first major extinction event recorded in the rock record. An estimated 25% of the known (marine) taxonomic families were ...