Utiliser "ordovician" dans une phrase

1. the Ordovician progressed, we see evidence of glaciers on the

2. During the Ordovician, the southern continents were collected

3. of the Late Ordovician, from 460 to 450 million years ago,

4. By the end of the Late Ordovician

5. Our world was a very different place with the Late Ordovician