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Intervals
Macrostrat
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Cryogenian
264
Type
Period
Age range
720–635
Ma
International Timescale
also
International Periods
Proterozoic
Neoproterozoic
Ediacaran
Cryogenian
Tonian
720
715
710
705
700
695
690
685
680
675
670
665
660
655
650
645
640
635
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