Geological terms – How long ago?

Mesozoic 248m to 65m years ago Sub divided
248 million to 206 million years ago
206 m to 144 m years
144 m to 65 m years
Cenozoic 65 m years ago to today Sub divided
Tertiary 65 m to 1.8 m years ago Palaeocene 65 million to 55 million years ago
Eocene 55 m 34 m
Oligocene 34 m 24 m
Miocene 24 m 5 m
Pliocene 5 m 1.8 m
Quaternary 1.8m years ago to today Pleistocene 1.8 million to 10,000 years ago
Holocene 10,000 years to today


Other terms
(Anthropological, rather than Geological terms)
Lower Paleolithic
2.5 m to 200,000 years ago. First stone tools used by hominids
Middle Paleolithic
200,000 to 40,000 years ago – Homo Sapiens using flaked stone tools.
Upper Paleolithic
40,000 to 10,000 years ago. Language thought to have developed in this time
10,000 years to when farming started around 5 – 6000 years ago
(Middle Stone age)
From the start of farming to the start of the use of metal tools, say from 5-6000 to 4000 years ago
Bronze Age
2200BC to 700BC
Iron Age
700BC to the Roman Conquest.

Want to know more? What came before the Mesozoic?