Ediacaran

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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.

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