Үлгі:Ордовик graphical timeline

Key events in the Ordovician

-490 —

–

-485 —

–

-480 —

–

-475 —

–

-470 —

–

-465 —

–

-460 —

–

-455 —

–

-450 —

–

-445 —

–

Cambrian

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.

↑ 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.

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