Difference between revisions of "Template:Geologic time scale"

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|style="background:#b3b25e"| [[Orosirian]]
 
|style="background:#b3b25e"| [[Orosirian]]
|colspan="3"| The [[Earth's atmosphere|atmosphere]] become [[oxygen]]ic. [[Vredefort crater|Vredefort]] and [[Sudbury Basin]] asteroid impacts. Much [[orogeny]]. [[Penokean orogeny|Penokean]] and [[Trans-Hudsonian Orogeny|Trans-Hudsonian Orogenies]] in North America. Early Ruker Orogeny in Antarctica, 2000 - 1700 [[Year#SI_prefix_multipliers|Ma]]. Glenburgh Orogeny, [[Gascoyne Complex|Glenburgh Terrane]], [[Australia (Continent)|Australian Continent]] [[circa|c.]] 2005 - 1920 [[Year#SI_prefix_multipliers|Ma]]. Kimban Orogeny, [[Gawler craton]] in Australian Continent begins.
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|colspan="3"| The [[Earth's atmosphere|atmosphere]] become [[oxygen]]ic. [[Vredefort crater|Vredefort]] and [[Sudbury Basin]] asteroid impacts. Much [[orogeny]]. [[Penokean orogeny|Penokean]] and [[Trans-Hudsonian Orogeny|Trans-Hudsonian Orogenies]] in North America. Early Ruker Orogeny in Antarctica, 2000 - 1700 [[Year#SI_prefix_multipliers|Ma]]. Glenburgh Orogeny, [[Gascoyne Complex|Glenburgh Terrane]], [[Australia (Continent)|Australian Continent]] [[circa|c.]] 2005–1920 [[Year#SI prefix multipliers|Ma]]. Kimban Orogeny, [[Gawler craton]] in Australian Continent begins.
 
|style="background:#b3b25e"| 2050<ref name="absolute-age" />
 
|style="background:#b3b25e"| 2050<ref name="absolute-age" />
 
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|style="background:#b2b5af"| [[Mesoarchean]]<ref name="Precambrian-Time" />
 
|style="background:#b2b5af"| [[Mesoarchean]]<ref name="Precambrian-Time" />
|colspan="4"| First [[stromatolite]]s (probably [[Colony (biology)|colonial]] [[cyanobacteria]]). Oldest [[macrofossil]]s. Humboldt Orogeny in Antarctica. [[Blake River Megacaldera Complex]] begins to form in present-day [[Ontario]] and [[Quebec]], ends by roughly 2696 [[Year#SI_prefix_multipliers|Ma]].
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|colspan="4"| First [[stromatolite]]s (probably [[colony (biology)|colonial]] [[cyanobacteria]]). Oldest [[macrofossil]]s. Humboldt Orogeny in Antarctica. [[Blake River Megacaldera Complex]] begins to form in present-day [[Ontario]] and [[Quebec]], ends by roughly 2696 [[Year#SI_prefix_multipliers|Ma]].
 
|style="background:#b2b5af"| 3200<ref name="absolute-age" />
 
|style="background:#b2b5af"| 3200<ref name="absolute-age" />
 
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|style="background:#999791"| [[Paleoarchean]]<ref name="Precambrian-Time" />
 
|style="background:#999791"| [[Paleoarchean]]<ref name="Precambrian-Time" />
|colspan="4"| First known [[phototroph|oxygen-producing]] [[bacteria]]. Oldest definitive [[microfossils]]. Oldest [[craton]]s on Earth (such as the [[Canadian Shield]] and the [[Pilbara Craton]]) may have formed during this period<ref name="Oldest-craton">The age of the oldest measurable [[craton]], or [[continental crust]], is dated to 3600&ndash;3800 Ma</ref>. Rayner Orogeny in Antarctica.
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|colspan="4"| First known [[phototroph|oxygen-producing]] [[bacteria]]. Oldest definitive [[microfossils]]. Oldest [[craton]]s on Earth (such as the [[Canadian Shield]] and the [[Pilbara Craton]]) may have formed during this period<ref name="Oldest-craton">The age of the oldest measurable [[craton]], or [[continental crust]], is dated to 3600–3800 Ma</ref>. Rayner Orogeny in Antarctica.
 
|style="background:#999791"| 3600<ref name="absolute-age" />
 
|style="background:#999791"| 3600<ref name="absolute-age" />
 
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|style="background:#809090"| 3800
 
|style="background:#809090"| 3800
 
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|rowspan="4" style="background:#809090"| [[Hadean]]<br /><ref name="Precambrian-Time" /><ref name="hadeon-not-formal">Though commonly used, the [[Hadean]] is not a formal eon and no lower bound for the Archean and Eoarchean have been agreed upon. The Hadean has also sometimes been called the Priscoan or the Azoic. Sometimes, the Hadean can be found to be subdivided according to the [[lunar geologic time scale]]. These eras include the [[Cryptic era|Cryptic]] and [[Basin Groups]] (which are subdivisions of the [[Pre-Nectarian|pre-Nectarian era]]), [[Nectarian]], and [[Early Imbrian]] units.</ref>
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|rowspan="4" style="background:#809090"| [[Hadean]]<br /><ref name="Precambrian-Time" /><ref name="hadeon-not-formal">Though commonly used, the [[Hadean]] is not a formal eon and no lower bound for the Archean and Eoarchean have been agreed upon. The Hadean has also sometimes been called the Priscoan or the Azoic. Sometimes, the Hadean can be found to be subdivided according to the [[lunar geologic time scale]]. These eras include the [[Cryptic era|Cryptic]] and [[Basin Groups]] (which are subdivisions of the [[Pre-Nectarian]] era), [[Nectarian]], and [[Early Imbrian]] units.</ref>
 
|style="background:#809090"| [[Early Imbrian]]<ref name="Precambrian-Time" /><ref name="Lunar-geologic-timescale-names">These unit names were taken from the [[Lunar geologic timescale]] and refer to geologic events that did not occur on Earth. Their use for Earth geology is unofficial.</ref>
 
|style="background:#809090"| [[Early Imbrian]]<ref name="Precambrian-Time" /><ref name="Lunar-geologic-timescale-names">These unit names were taken from the [[Lunar geologic timescale]] and refer to geologic events that did not occur on Earth. Their use for Earth geology is unofficial.</ref>
|colspan="4"| Indirect [[photosynthetic]] evidence (e.g., [[kerogen]]) of primoidial life.  This era overlaps the end of the [[Late Heavy Bombardment]] of the [[inner solar system|inner]] [[solar system]].
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|colspan="4"| Indirect [[photosynthetic]] evidence (e.g., [[kerogen]]) of primordial life.  This era overlaps the end of the [[Late Heavy Bombardment]] of the [[inner solar system|inner]] [[solar system]].
 
|style="background:#809090"| c.3850
 
|style="background:#809090"| c.3850
 
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|style="background:#809090"| [[Nectarian]]<ref name="Precambrian-Time" /><ref name="Lunar-geologic-timescale-names" />
 
|style="background:#809090"| [[Nectarian]]<ref name="Precambrian-Time" /><ref name="Lunar-geologic-timescale-names" />
|colspan="4"| This unit gets its name from the [[lunar geologic timescale]] when the [[Nectaris Basin]] and other major [[lunar basin]]s form by large [[impact event]]s.
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|colspan="4"| This unit gets its name from the [[lunar geologic timescale]] when the [[Nectaris Basin]] and other greater [[lunar basin]]s form by big [[impact event]]s.
 
|style="background:#809090"| c.3920
 
|style="background:#809090"| c.3920
 
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Revision as of 22:37, 3 June 2011