The evidence indicates that climate change caused the extinctions. A major ice age is known to have occurred in the southern hemisphere and climates cooled ...

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 ...

Cooling and a falling sea level brought on by the glaciation led to habitat loss for many organisms along the continental shelves, especially endemic taxa with ...

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 ...

31 окт. 2024 г. · The Ordovician Period ushered in significant changes in plate tectonics, climate, and biological systems. Rapid seafloor spreading at oceanic ...

28 апр. 2023 г. · Mass Extinction. The extinction that occurred at the end of the Ordovician Period devastated marine communities. This extinction is the first ...

30 нояб. 2018 г. · The results also indicate that there were shifts in diversification patterns following the extinction event; and while most families survived, ...

Then, something happened. The global temperatures cooled and the sea levels fell. Considering that much of the plant and animal diversity of the time had ...

Late Ordovician refers to a specific time period between 458 to 423 million years ago, characterized by a transition from a greenhouse to an icehouse world ...

The extinctions removed about 75% of animal species and were coincident with a major ice age. The search for an ultimate cause has proved difficult for both the ...