Permian

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Permian Period
298.9–252.2 million years ago
Mean atmospheric O
2
content ower period duration
c. 23 vol %[1][2]
(115 % of modern level)
Mean atmospheric CO
2
content ower period duration
c. 900 ppm[3][4]
(3 times pre-industrial level)
Mean surface temperature ower period duration c. 16 °C[5][6]
(2 °C above modern level)
Sea level (abuin present day) Relatively constant at 60 m (200 ft) in early Permian; plummetin during the middle Permian tae a constant −20 m (−66 ft) in the late Permian.[7]
Key events in the Permian
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-300 —
-295 —
-290 —
-285 —
-280 —
-275 —
-270 —
-265 —
-260 —
-255 —
-250 —
An approximate timescale o key Permian events.
Axis scale: millions o years ago.

The Permian, accordin tae maist scientists, is a geologic period an seestem which spans 46.7 million years frae the end o the Carboniferous Period 298.9 million years ago (Mya), tae the beginnin o the Triassic Period 252.2 Mya.[8]

References[eedit | eedit soorce]