Template: Cambrian graphical timeline

Key events in the Cambrian

-545 —

–

-540 —

–

-535 —

–

-530 —

–

-525 —

–

-520 —

–

-515 —

–

-510 —

–

-505 —

–

-500 —

–

-495 —

–

-490 —

–

 

 

 

Ediacaran

 

Nemakit-
Daldynian

Tommotian

Atdabanian

Botomian

Toyonian

Middle
Cambrian

Furongian

Ordovician

 

 

←

Orsten Fauna

←

Burgess Shale

←

Sirius Passet Fauna

←

Chengjiang Fauna

←

First Trilobites

←

First Arthropod trace fossils

C
a
m
b
r
i
a
n

←

and Echinoderms

 Neoproterozoic

(last era of the Precambrian)
 Palæozoic

(first era of the Phanerozoic)

An approximate timescale of key Cambrian events.
The Cambrian explosion took place during the lower Cambrian, but its duration is poorly defined.
Axis scale: millions of years ago.

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