The conodonts are now thought to have been true ... group-living animals that built coral-like structures. Ordovician reefs were also home to large sea lilies, relatives of sea stars.

Spanish researchers have found fossils of Ordovician conodonts dating to between 446 and 444 million years ago for the first time in the western Mediterranean. The discovery of these very ...

Sci. Lett. 253, 291–303 (2007). Article Google Scholar Zhang, J. Middle Ordovician Conodonts from the Atlantic Faunal Region and the Evolution of Key Conodont Genera. Thesis, Univ.

Focus: Reconstructing the biostratigraphy and palaeogeography of conodont faunas from the Middle East Our conodont research focuses on several important Ordovician and Silurian ... Silurian conodonts ...

(Asteroids are no masters of subtlety.) The Late Ordovician mass extinction, the oldest of all and the second most lethal, isn’t one of them. Though there is a standard explanation for this granddaddy ...

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 ...

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 ...

During the Ordovician period, the concentration of carbon dioxide in Earth's atmosphere was about eight times higher than today. It has been hard to explain why the climate cooled and why the ...

Scientists have previously believed the Late Ordovician event some 450 million years ago was linked to the end of an ice age, resulting in rising sea levels and plummeting oxygen levels in the oceans.