Template: Geology to Paleobiology
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Segments of rock (strata) in chronostratigraphy | Periods of time in geochronology | Notes |
---|---|---|
4 total, half a billion years or more | ||
12 total, several hundred million years | ||
tens of millions of years | ||
millions of years | ||
smaller than an age/stage, not used by the ICS timescale |
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- ↑ International Commission on Stratigraphy. International Stratigraphic Chart. Retrieved 2008-06-17.