Life at the start of the Ordovician remained confined to the seas with new animals evolving in place of those that didn't survive the Cambrian. Chief among them were the squidlike nautiloids ...

After the Ordovician Period came the Silurian Period ... providing shelter for fish and shelled creatures, such as nautiloids and ammonoids. Modern conifers and ginkgo trees evolved on land.

Roughly 85 percent of all species disappeared during the end-Ordovician crisis ... scientists also identified a few conical-shelled nautiloids and one sea scorpion. "We think the sponges thrived ...

This unprecedented die-off is now known as the earth’s first mass extinction, the Late Ordovician mass extinction or simply LOME. Many researchers have devoted time, or even careers, to uncovering the ...

It came during the Ordovician period, right after the Cambrian came to a close 485 million years ago. The Ordovician Radiation, also called the Great Ordovician Biodiversification Event (GOBE ...

It came in the form of a second explosion of life called the Great Ordovician Biodiversification Event, a little-heard-of episode which has been the focus of intense scientific interest in recent ...

The fossilized time capsule from Castle Bank is from the middle of the succeeding Ordovician Period, about 462 million years ago. The Ordovician was a critical time in the history of life when ...

Giant Trilobites And Trilobite Clusters From The Ordovician Of Portugal. ScienceDaily . Retrieved May 26, 2025 from www.sciencedaily.com / releases / 2009 / 05 / 090505072714.htm ...