Template:Ordovician graphical timeline

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Key events in the Ordovician

-490 —

–

-485 —

–

-480 —

–

-475 —

–

-470 —

–

-465 —

–

-460 —

–

-455 —

–

-450 —

–

-445 —

–

Cambrian

Dapingian

Sandbian

Katian

Early Ordovician

Silurian

←

First land plant spores^[1]

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Key events of the Ordovician period.
Left: ICS approved stages.
Right: "General" stages.
Axis scale: millions of years ago.

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