Geological Timeline

By Matt Baker email   Updated 8 Jan 2013

This geological timeline divides the last 4.5 billion years on earth into eons, eras, periods, and epochs according to the most commonly accepted dates, terms and definitions.

No. of years ago (Epoch) / Period Era Eon
4.5b - 3.8b HADEON
 

P
R
E
C
A
M
B
R
I
A
N
3.8b - 2.5b ARCHEAN
2.5 b - 542m PROTEROZOIC
542m - 488.3m Cambrian
 
Paleozoic PHANEROZOIC
488.3m - 443.7m Ordovician
M a j o r   E x t i n c t i o n   E v e n t
443.7m - 416m Silurian
 
416m - 359.2m Devonian
M a j o r   E x t i n c t i o n   E v e n t
359.2m - 299m Carboniferous
 
299m - 251m Permian
P e r m i a n - T r i a s s i c   E x t i n c t i o n   E v e n t
251m - 199m Triassic Mesozoic
M a j o r   E x t i n c t i o n   E v e n t
199m - 145.5m Jurassic
 
145.5m - 65.5m Cretaceous
C r e t a c e o u s - T e r t i a r y   ( K - T )   E x t i n c t i o n   E v e n t
65.5m - 56m (Paleocene) Paleogene Cenozoic
56m - 34m (Eocene)
34m - 23m (Oligocene)
23m - 5.3m (Miocene)
 
Neogene
5.3m - 2.588m (Pliocene)
2.588m - 10,000 (Pleistocene)
 
Quaternary
10,000 - present (Holocene)