| Sentit | From 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds. | |
|---|---|---|
| Espècimen de | període | A unit of geological time during which a system of rocks formed |
| Part de | Paleozoic | From 544 million to about 230 million years ago |
| Anglès | Ordovician, Ordovician period | |
| Espanyol | Ordoviciano, ordovícico | |
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