Ordovician Period — synonyms, definition

1. Ordovician period (Noun)

1 synonym
Ordovician
1 definition

Ordovician period (Noun) — From 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds.

2 types of
geological period period
3 parts of
Palaeozoic Paleozoic Paleozoic era
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