Template:Cambrian explosion graphical timeline

Key Cambrian explosion events

-580 —

–

-570 —

–

-560 —

–

-550 —

–

-540 —

–

-530 —

–

-520 —

–

-510 —

–

-500 —

–

-490 —

N
e
o
p
r
o
t
e
r
o
z
o
i
c

P
a
l
e
o
z
o
i
c

Ediacaran

C
a
m
b
r
i
a
n

Ordovician

Cryogenian

T
e
r
r
e
n
e
u
v
i
a
n

S
e
r
i
e
s

2

S
e
r
i
e
s

3

F
u
r
o
n
g
i
a
n

U
p
p
e
r

M
i
d
d
l
e

L
o
w
e
r

Nemakit-
Daldynian

Tommotian

Atdabanian

Botomian

Toyonian

Stage 5

Drumian

Guzhangian

Paibian

Stage 9

Stage 10

←

Orsten Fauna

←

Burgess Shale

←

Kaili biota

←

Archaeocyatha extinction

←

Emu Bay Shale

←

Sirius Passet and Chengjiang biotas

←

First arthropods with mineralized carapace (Trilobites)

←

SSF diversification, first brachiopods & archaeocyatha, Rusophycus traces & more complex vertical burrows

←

First halkieriids, mollusсs, hyoliths SSF

←

Treptichnus pedum trace

←

First Treptichnus sp. trace

←

First Cloudina & Namacalathus mineral skeletal fossils

←

Claimed bilaterian trace fossils

←

First Ediacara biota members (Charnia antecedens, C. wardae, Thectardis)

←

Glaskiers glaciation

←

Doushantuo "embryos"

←

End Marinoan glaciation

-635 —

One possible timescale for events around the Cambrian/Precambrian boundary.

Axis scale: millions of years ago.

Stratigraphic scale of the ICS with Russian Lower Cambrian subdivision and Precambrian/Cambrian boundary.