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Intervals
Macrostrat
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Middle Cambrian
128
Type
Epoch
Age range
511–501
Ma
International Timescale
Miaolingian
Drumian
Wuliuan
Series 2
Stage 4
Custom COSUNA
Dresbachian
Middle Cambrian
Early Cambrian
COSUNA
Dresbachian
Middle Cambrian
Early Cambrian
Russian Epochs
Late Cambrian
Middle Cambrian
Early Cambrian
511
511
510
510
509
509
508
508
507
507
506
506
505
505
504
504
503
503
502
502
501
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