Ìgbà Dẹfoníà: Ìyàtọ̀ láàrin àwọn àtúnyẹ̀wò
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k r2.7.3) (Bot: Ìfikún ms:Devonian |
k r2.7.3) (Robot: Modifying ms:Devonian to ms:Zaman Devon; cosmetic changes |
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|sea level = Relatively steady around 180m, gradually falling to 120m through period<ref>{{cite journal | author = Haq, B. U.| year = 2008| doi = 10.1126/science.1161648 | title = A Chronology of Paleozoic Sea-Level Changes | journal = Science | volume = 322 | pages = 64–68 | pmid = 18832639 | last2 = Schutter | first2 = SR | issue = 5898 }}</ref> |
|sea level = Relatively steady around 180m, gradually falling to 120m through period<ref>{{cite journal | author = Haq, B. U.| year = 2008| doi = 10.1126/science.1161648 | title = A Chronology of Paleozoic Sea-Level Changes | journal = Science | volume = 322 | pages = 64–68 | pmid = 18832639 | last2 = Schutter | first2 = SR | issue = 5898 }}</ref> |
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The '''Devonian''' is a [[geologic period|geologic period and system]] of the [[Paleozoic]] Era spanning from {{Ma|416|359.2}} {{ICS 2004}}. |
The '''Devonian''' is a [[geologic period|geologic period and system]] of the [[Paleozoic]] Era spanning from {{Ma|416|359.2}} {{ICS 2004}}. It is named after [[Devon]], [[England]], where rocks from this period were first studied. |
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During the Devonian Period the pectoral and pelvic fins of [[lobe-finned fish]] evolved into [[Leg (anatomy)|legs]]<ref>See ''[[Tiktaalik]]''.</ref> as they started to walk on [[Landform|land]] as [[tetrapod]]s around 397 [[Mega-annum|Ma]].<ref>[http://news.bbc.co.uk/1/hi/sci/tech/8443879.stm] Fossil tracks record 'oldest land-walkers' - BBC News</ref> Various terrestrial [[arthropod]]s also became well-established. |
During the Devonian Period the pectoral and pelvic fins of [[lobe-finned fish]] evolved into [[Leg (anatomy)|legs]]<ref>See ''[[Tiktaalik]]''.</ref> as they started to walk on [[Landform|land]] as [[tetrapod]]s around 397 [[Mega-annum|Ma]].<ref>[http://news.bbc.co.uk/1/hi/sci/tech/8443879.stm] Fossil tracks record 'oldest land-walkers' - BBC News</ref> Various terrestrial [[arthropod]]s also became well-established. |
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==Itokasi== |
== Itokasi == |
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[[lv:Devons]] |
[[lv:Devons]] |
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[[ml:ഡെവോണിയൻ കാലഘട്ടം]] |
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[[ms:Zaman Devon]] |
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[[nds:Devon (Geologie)]] |
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Àtúnyẹ̀wò ní 05:36, 5 Oṣù Kọkànlá 2012
| Ìgbà Dẹfoníà 416–359.2 ẹgbẹgbẹ̀rún ọdun sẹ́yìn | |
| Fáìlì:LateDevonianGlobal.jpg | |
| Mean atmospheric O2 content over period duration | ca. 15 Vol %[1] (75 % of modern level) |
| Mean atmospheric CO2 content over period duration | ca. 2200 ppm[2] (8 times pre-industrial level) |
| Mean surface temperature over period duration | ca. 20 °C[3] (6 °C above modern level) |
| Sea level (above present day) | Relatively steady around 180m, gradually falling to 120m through period[4] |
The Devonian is a geologic period and system of the Paleozoic Era spanning from 416 to 359.2 ẹgbẹgbẹ̀rún ọdún sẹ́yìn (ICS, 2004,[5] chart). It is named after Devon, England, where rocks from this period were first studied.
During the Devonian Period the pectoral and pelvic fins of lobe-finned fish evolved into legs[6] as they started to walk on land as tetrapods around 397 Ma.[7] Various terrestrial arthropods also became well-established.
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Àyọkà yìí tàbí apá rẹ̀ únfẹ́ àtúnṣe sí. Ẹ le fẹ̀ jù báyìí lọ tàbí kí ẹ ṣàtúnṣe rẹ̀ lọ́nà tí yíò mu kúnrẹ́rẹ́. Ẹ ran Wikipedia lọ́wọ́ láti fẹ̀ẹ́ jù báyìí lọ. |
Itokasi
- ↑ Image:Sauerstoffgehalt-1000mj.svg
- ↑ Image:Phanerozoic Carbon Dioxide.png
- ↑ Image:All palaeotemps.png
- ↑ Haq, B. U.; Schutter, SR (2008). "A Chronology of Paleozoic Sea-Level Changes". Science 322 (5898): 64–68. doi:10.1126/science.1161648. PMID 18832639.
- ↑ Gradstein, Felix M.; Ogg, J. G.; Smith, A. G. (2004). A Geologic Time Scale 2004. Cambridge: Cambridge University Press. ISBN 0521786738.
- ↑ See Tiktaalik.
- ↑ [1] Fossil tracks record 'oldest land-walkers' - BBC News
| Preceded by Proterozoic Eon | 542 Ma - Phanerozoic Eon - Present | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 542 Ma - Paleozoic Era - 251 Ma | 251 Ma - Mesozoic Era - 65 Ma | 65 Ma - Cenozoic Era - Present | ||||||||||
| Kámbríà | Ọ̀rdòfísíà | Sílúríà | Dẹfoníà | Eléèédú | Pẹ́rmíà | Tríásíkì | Jùrásíkì | Ẹlẹ́fun | Ìbíniàtijọ́ | Ìbíniọ̀tun | Quaternary | |