Geological Time Scale

EON ERA PERIOD EPOCH Agnostids Redlichids Corynexochids Lichids Phacopids Ptychoparids Asaphids Proetids

P
H
A
N
E
R
O
Z
O
I
C

C
e
n
o
z
o
i
c
Neogene Holocene
Pleistocene
Pliocene
Miocene
Paleogene Oligocene
Eocene
Paleocene
M
e
s
o
z
o
i
c
Cretaceous
Jurassic
Triassic
P
a
l
e
o
z
o
i
c
Permian  
Pennsylvanian  
Mississippian  
Devonian          
Silurian            
Ordovician              
Cambrian            

Proterozoic

Archaen

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