Ordovician-Silurian Extinction (about 443 million years ago): Around 85% of species went extinct, likely due to a combination of a drop in sea levels and glaciation, followed by rising sea levels ...

although it’s unclear if whether that amounts to a sixth mass extinction. The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the ...

Additionally, the role of volcanism during the Ordovician-Silurian transition has been ... This connection between volcanism and extinction events underscores the complex interplay of geological ...

These first steps toward life on land were cut short by the freezing conditions that gripped the planet toward the end of the Ordovician. This resulted in the second largest mass extinction of all ...

although it’s unclear if whether that amounts to a sixth mass extinction. The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the ...

But first there was a period of biological regrouping following the disastrous climax to the Ordovician ... The Silurian drew to a close with a series of extinction events linked to climate ...

The Silurian period, which occurred approximately 443 to 419 million years ago, is marked by significant geological and biological changes, including extinction events and notable shifts in carbon ...

We study trilobites from four periods of the Palaeozoic: the Cambrian, Ordovician, Silurian and Devonian. Our research covers trilobite taxonomy, phylogeny, functional morphology, biogeography, and ...