Periods and Epochs

Period
 
Quaternary 
A geological time period beginning around 2.5 million years ago (2,588,000 ± 0.005 years) and lasting to the present day. It is divided into two epochs – the Pleistocene and the Holocene.
 
Epoch
 
Pleistocene 
2,588,000 – 11,700 years ago. A subdivision of the Quaternary  geological period. The end of the Pleistocene corresponds with the end of the last ice age and broadly with the end of the Palaeolithic. The Pleistocene is divided into three sub-epochs, two of which are relevant here – the middle Pleistocene and the late Pleistocene.
 
Holocene 
11,700 years ago – present. A subdivision of the Quaternary geological period. Holocene means ‘entirely recent’.
 
1978