Cretaceous References | Navigâtion menuedit4135819-300562851
CretaceousMesozoicGeological periodsMesozoic geochronology
geologic period an seestemJurassicMyaPaleogene
Cretaceous
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Cretaceous Period 145–66 million years ago PreЄ Є O S D C P T J K Pg N | |
Mean atmospheric O 2 content ower period duration | c. 30 vol %[1][2] (150 % of modern level) |
Mean atmospheric CO 2 content ower period duration | c. 1700 ppm[3][4] (6 times pre-industrial level) |
Mean surface temperature ower period duration | c. 18 °C[5][6] (4 °C above modern level) |
Key events in the Cretaceous view • discuss • -140 — – -130 — – -120 — – -110 — – -100 — – -90 — – -80 — – -70 — – An approximate timescale of key Cretaceous events. Axis scale: millions of years ago. | |
The Cretaceous, accordin tae present scienteefic consensus, is a geologic period an seestem that spans 79 million years frae the end o the Jurassic Period 145 million years ago (Mya) tae the beginning o the Paleogene Period 66 Mya.
References |
↑ Image:Sauerstoffgehalt-1000mj.svg
↑ Image:OxygenLevelsThroughEarthHistory.png
↑ Image:Phanerozoic Carbon Dioxide.png
↑ Image:CO2LevelsThroughEarthHistory.png
↑ Image:All palaeotemps.png
↑ Image:TemperatureLevelsOverEarthHistory.png
Categeries:
- Cretaceous
- Mesozoic
- Geological periods
- Mesozoic geochronology
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