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Intervals
Macrostrat
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Calymmian
268
Type
Period
Age range
1600–1400
Ma
International Timescale
also
International Periods
Proterozoic
Mesoproterozoic
Ectasian
Calymmian
Paleoproterozoic
Statherian
1,600
1,590
1,580
1,570
1,560
1,550
1,540
1,530
1,520
1,510
1,500
1,490
1,480
1,470
1,460
1,450
1,440
1,430
1,420
1,410
1,400
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