Unique fossil site discovered in Wales reveals early life forms By Katie Hunt, CNN ... Castle Bank dates from 50 million years later in the Middle Ordovician. ...

Fossil Content of Local Limestone. The fossil content of local limestone shows the diversity of life in the late Ordovician period. Bryozoans and brachiopods, nearly equal in abundance, form about 60% ...

The Cambrian explosion, long hailed as one of the most significant events in the history of life on Earth, has now been brought into question. New research suggests that this dramatic burst of ...

The Ordovician Fezouata Shale fossil site at Jbel Tizagzaouine has been selected by the IUGS as one of their “First 100 IUGS Geological Heritage Sites”. The site was supported by two of IGCP project ...

The Ordovician extinction killed 60 per cent of marine invertebrates at a time when life was largely confined to the sea, while the late Devonian wiped out around 70 per cent of all species and ...

Ordovician sea life. Credit: Fritz Geller-Grimm / National Museum of Natural History / CC BY-SA 2.5.

If you were to look up from Earth some 466 million years ago, you might have seen a gleaming ring stretching across the sky, some scientists say.