| Mesozoic | 248m to 65m years ago | Sub divided | |
|---|---|---|---|
| Triassic | 248 million to 206 million years ago |
||
| Jurassic | 206 m to 144 m years |
||
| Cretaceous | 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 |
| (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 |
Mesolithic
|
10,000 years to when farming started around 5 - 6000 years ago (Middle Stone age) |
Neolithic
|
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. |