Open main menu
Permian Period
298.9–251.902 million years aby
Mean atmospheric O
2
content ower period duration
c. 23 vol %
(115 % o modren level)
Mean atmospheric CO
2
content ower period duration
c. 900 ppm
(3 times pre-industrial level)
Mean surface temperatur ower period duration c. 16 °C
(2 °C abuin modren 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.[1]
Key events in the Permian
-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.[2]

ReferencesEedit

  1. Haq, B. U.; Schutter, SR (2008). "A Chronology of Paleozoic Sea-Level Changes". Science. 322 (5898): 64–68. Bibcode:2008Sci...322...64H. doi:10.1126/science.1161648. PMID 18832639. 
  2. ICS (2012). "International Chronostratigraphic Chart".