The Silurian period.
Ordovician .
Ordovician Period
copper
The Ordovician Period
Cambrain
Ordovician period
Ordovician Period
Ordovician Period
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The Ordovician lasted for 47 million years from 490 to 443 Million Years Ago.
Algae was the dominant plant of the Ordovician. There were little to no other plants (other then algae) during the Ordovician. In the Ordovician, the common types of algae were Stromatolites (Blue green algae), and Tetradium (Red algae).