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The Geological Timescale |
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Era |
Sub-Era |
Period |
Epoch |
Stage/ |
Start |
Major |
|
Cambrian |
Caerfai |
Tommotian |
570.0 |
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Precambrian |
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Proterozoic |
Sinian |
Vendian |
Ediacara |
Poundian |
580 |
|
|
Wonokan |
590 |
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|
Varanger |
Mortensnes |
600 |
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|
Smalfjord |
610 |
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|
Sturtian |
825 |
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|
Riphean |
Karatau |
1100 |
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Yurmatian |
1375 |
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Burzyan |
1675 |
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Animikean |
2225 |
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Huronian |
2475 |
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Archaean |
Randian |
2825 |
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Swazian |
3525 |
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Isuan |
3875 |
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Priscoan |
Hadean |
Early Imbrian |
3900 |
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Nectarian |
3975 |
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Basin Groups |
4150 |
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Cryptic |
4560 |
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Sources: Harland W.B., et al., "A Geologic Time Scale 1989," Cambridge University Press: Cambridge UK, Revised Edition, 1990. Allaby A. & Allaby M., eds, "A Dictionary of Earth Sciences," [1990], Oxford University Press: Oxford UK, Second Edition, 1999. |
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