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⚫ | |+]<ref>{{citation | first1=K.M. |last1=Cohen |first2=S. |last2=Finney |first3=P.L. |last3=Gibbard|title=International Chronostratigraphic Chart |year=2015| publisher = International Commission on Stratigraphy |url=http://www.stratigraphy.org/ICSchart/ChronostratChart2015-01.pdf }}.</ref> | ||
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!Segments of rock (]) in ] | !Segments of rock (]) in ] | ||
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!Time spans in ] | ||
!Notes to<br/>geochronological units | |||
!Notes | |||
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| style="text-align:center;" | ] || style="text-align:center;" | ] || 4 total, half a billion years or more | ||
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| style="text-align:center;" | ] || style="text-align:center;" | ] || 10 defined, several hundred million years | ||
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| style="text-align:center;" | ] || style="text-align:center;" | ] || 22 defined, tens to ~one hundred million years | ||
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| style="text-align:center;" | ] || style="text-align:center;" | ] || 34 defined, tens of millions of years | ||
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| style="text-align:center;" | ] || style="text-align:center;" | ] || 99 defined, millions of years | ||
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| style="text-align:center;" | ] || style="text-align:center;" | ] || subdivision of an age, not used by the ICS timescale | ||
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{{Template reference list}} | {{Template reference list}} | ||
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Latest revision as of 19:49, 7 September 2021
Segments of rock (strata) in chronostratigraphy | Time spans in geochronology | Notes to geochronological units |
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Eonothem | Eon | 4 total, half a billion years or more |
Erathem | Era | 10 defined, several hundred million years |
System | Period | 22 defined, tens to ~one hundred million years |
Series | Epoch | 34 defined, tens of millions of years |
Stage | Age | 99 defined, millions of years |
Chronozone | Chron | subdivision of an age, not used by the ICS timescale |
References
These references will appear in the article, but this list appears only on this page.- Cohen, K.M.; Finney, S.; Gibbard, P.L. (2015), International Chronostratigraphic Chart (PDF), International Commission on Stratigraphy.