Template:Ordovician graphical timeline

Key events in the Ordovician

-485 —

–

-480 —

–

-475 —

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-470 —

–

-465 —

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-460 —

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-455 —

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-450 —

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-445 —

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P
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Cambrian

O
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Silurian

←

First laund plant spores^[1]

←

Ordovician meteor event

←

Archaeocyatha extinction

Key events o the Ordovician Period.
ICS approved stages.

Axis scale: millions o years ago.^[2]

References

↑ Wellman, C.H.; Gray, J. (2000). "The microfossil record of early land plants". Phil. Trans. R. Soc. B. 355 (1398): 717–732. doi:10.1098/rstb.2000.0612. PMC 1692785. PMID 10905606.
↑ Gradstein, F. M., ed. (2012). The Geologic Time Scale 2012. Elsevier Science Ltd. p. 504. ISBN 978-0444594259.

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