Cambrian

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Cambrian Period
541–485.4 million years ago
Mean atmospheric O
2
content ower period duration
c. 12.5 vol %[1][2]
(63 % of modern level)
Mean atmospheric CO
2
content ower period duration
c. 4500 ppm[3][4]
(16 times pre-industrial level)
Mean surface temperature ower period duration c. 21 °C[5][6]
(7 °C above modern level)
Sea level (abuin present day) Risin steadily frae 30m tae 90m[7]
Key events in the Cambrian
view • discuss • edit
-550 —
-540 —
-530 —
-520 —
-510 —
-500 —
-490 —
 
 
 
 
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Orsten Fauna
Archaeocyatha extinction
SSF diversification, first brachiopods & archaeocyatha
Treptichnus pedum trace
Lairge negative peak δ 13Ccarb excursion
First Cloudina & Namacalathus meeneral tubular fossils
Stratigrafic scale o the ICS subdiveesions an Precambrian/Cambrian boondar.

The Cambrian Period wis the first geological period o the Paleozoic Era, o the Phanerozoic Eon.[8]

References[eedit | eedit soorce]