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Ìgbà Ẹlẹ́fun Itokasi | Ètò ìtọ́sọ́nà145.565.5fẹ̀ẹ́ jù báyìí lọaInternational Stratigraphic Chart

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Ìgbà Ẹlẹ́fun




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Ìgbà Ẹlẹ́fun
145.5–65.5 ẹgbẹgbẹ̀rún ọdun sẹ́yìn

PreЄ

Є

O

S

D

C

P

T

J

K

Pg

N




Mean atmospheric O2 content over period duration

ca. 30 Vol %[1]
(150 % of modern level)

Mean atmospheric CO2 content over period duration

ca. 1700 ppm[2]
(6 times pre-industrial level)

Mean surface temperature over period duration

ca. 18 °C[3]
(4 °C above modern level)



The Ìgbà Ẹlẹ́fun tabi Ìgbà Ẹfun (Cretaceous) (play /krɪˈteɪʃəs/), derived from the Latin "creta" (chalk), usually abbreviated K for its German translation Kreide (chalk), is a geologic period and system from circa 145.5 ± 4 to 65.5 ẹgbẹgbẹ̀rún ọdún sẹ́yìn million years (Ma) ago. In the geologic timescale, the Cretaceous follows the Jurassic Period and is followed by the Paleogene Period of the Cenozoic Era. It is the youngest period of the Mesozoic Era, and at 80 million years long, the longest period of the Phanerozoic Eon. The end of the Cretaceous defines the boundary between the Mesozoic and Cenozoic eras.









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Itokasi |




  1. ↑ Image:Sauerstoffgehalt-1000mj.svg


  2. ↑ Image:Phanerozoic Carbon Dioxide.png


  3. ↑ Image:All palaeotemps.png








Ìgbà Ẹlẹ́fun

Lower/Early Cretaceous

Upper/Late Cretaceous

Berriasian | Valanginian | Hauterivian
Barremian | Aptian | Albian

Cenomanian | Turonian | Coniacian
Santonian | Campanian | Maastrichtian

















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

  • w

  • ọ

  • a


Geologic history of Earth







 
Phanerozoic (542 – 0 Mya)



In horizontal bars are eras; in left column are periods; right column: bold are epochs; not bold not italic are ages; italic are chrons:






 
Mesozoic (251 – 65.5 Mya)










Triassic
(251 – 199.6 Mya)

Early Triassic (251 – 245.9 Mya): Induan (251 – 249.5 Mya) · Olenekian (249.5 – 245.9 Mya)
Middle Triassic (245.9 – 228.7 Mya): Anisian (245.9 – 237 Mya) · Ladinian (237 – 228.7 Mya)
Late Triassic (228.7 – 199.6 Mya): Carnian (228.7 – 216.5 Mya) · Norian (216.5 – 203.6 Mya) · Rhaetian (203.6 – 199.6 Mya)

Jurassic
(199.6 – 145.5 Mya)

Early Jurassic (199.6 – 175.6 Mya): Hettangian (199.6 – 196.5 Mya) · Sinemurian (196.5 – 189.6 Mya) · Pliensbachian (189.6 – 183 Mya) · Toarcian (183 – 175.6 Mya)
Middle Jurassic (175.6 – 161.2 Mya): Aalenian (175.6 – 171.6 Mya) · Bajocian (171.6 – 167.7 Mya) · Bathonian (167.7 – 164.7 Mya) · Callovian (164.7 – 161.2 Mya)
Late Jurassic (161.2 – 145.5 Mya): Oxfordian (161.2 – 155.6 Mya) · Kimmeridgian (155.6 – 150.8 Mya) · Tithonian (150.8 – 145.5 Mya)

Cretaceous
(145.5 – 65.5 Mya)

Early Cretaceous (145.5 – 99.6 Mya): Berriasian (145.5 – 140.2 Mya) · Valanginian (140.2 – 133.9 Mya) · Hauterivian (133.9 – 130 Mya) · Barremian (130 – 125 Mya) · Aptian (125 – 112 Mya) · Albian (112 – 99.6 Mya)
Late Cretaceous (99.6 – 65.5 Mya): Cenomanian (99.6 – 93.6 Mya) · Turonian (93.6 – 88.6 Mya) · Coniacian (88.6 – 85.8 Mya) · Santonian (85.8 – 83.5 Mya) · Campanian (83.5 – 70.6 Mya) · Maastrichtian (70.6 – 65.5 Mya)





kya = thousands years ago. Mya = millions years ago. * Not officially recognized by the I.C.S.


Source: International Stratigraphic Chart. International Commission on Stratigraphy. Retrieved 8 February 2008.



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