EARTH SCIENCE |
Platte Canyon High
School |
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GEOLOGIC TIME SCALE Cambrian after Harland et al., 1982 |
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Period | Epoch | Age | Ma age | Comments |
505 | ||||
Cambrian | Merioneth | Dolgellian | ||
Maentwrogian | 523 | |||
St. David's | Menevian | |||
Solvan | 540 | |||
Caerfai | Lenian | |||
Atdabanian | ||||
Tommotian | 590 |