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| |fewest years spanned<big><big>'''<nowiki>*</nowiki>'''</big></big> | |fewest years spanned<big><big>'''<nowiki>*</nowiki>'''</big></big> | ||
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| |colspan=3|Units used that are outside the hierarchy of varying precision: ] | |||
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| |colspan=3|<big><big>'''<nowiki>*</nowiki>'''</big></big> Most and ''the most time specific'' time divisions<ref | |colspan=3|<big><big>'''<nowiki>*</nowiki>'''</big></big> Most and ''the most time specific'' time divisions<ref | ||
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Revision as of 19:42, 19 June 2008
| e h | ||
strata units of the geologic record |
units of the geological time system |
Main article: geologic time scale |
| Eonothem | Eon (geology) | largest spans of years |
| Erathem | Era (geology) | 3 total, hundreds of millions of years |
| System (geology) | Period (geology) | Some familiar names |
| Series (geology) | Epoch (geology) | Most familiar names |
| Stage (geology) | Age (geology) | fewest years spanned* |
| Units used that are outside the hierarchy of varying precision: chronozone | ||
| * Most and the most time specific time divisions | ||
 | This biology article is a stub. You can help Misplaced Pages by expanding it. |
- International Commission on Stratigraphy. "International Stratigraphic Chart" (PDF). Retrieved 2008-06-17.