Ediacaran
From Palaeos
| Proterozoic eon 2,500-542 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Paleoproterozoic era 2,500-1,600 | Mesoproterozoic era 1,600-1,000 | Neoproterozoic era 1,000-542 | |||||||
| Siderian 2,500-2,300 | Rhyacian 2,300-2,050 | Orosirian 2,050-1,800 | Statherian 1,800-1,600 | Calymmian 1,600-1,400 | Ectasian 1,400-1,200 | Stenian 1,200-1,000 | Tonian 1,000-850 | Cryogenian 850-630 | Ediacaran 630-542 |
The Ediacaran Period of the Neoproterozoic Era:
630 to 542 Mya
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The Ediacaran Period started at the end of the late proterozoic superglaciation, a warm period of increased biological activity developing into steadily larger creatures. Initially all animal forms lacked hard parts, and was therefore not easily fossilized, but the successively increasing oxygen levels generated by bioactivity allowed faster mobility, and more aggressive attack and defense. At the end of the Ediacaran, a few forms developed the beginnings of a body panzer, a development that continued into the Cambrian Explosion of the Phanerozoic.
Palaeos com Ediacaran
