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Kosvian
1739
Type
Age
Age range
350.9–346.73
Ma
International Timescale
Mississippian
Visean
Tournaisian
Russian Platform Regional Stages
Radaevkian
Kosvian
Kizelian
351.0
350.8
350.6
350.4
350.2
350.0
349.8
349.6
349.4
349.2
349.0
348.8
348.6
348.4
348.2
348.0
347.8
347.6
347.4
347.2
347.0
346.8
346.6
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