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Intervals
Macrostrat
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Siphonodella duplicata
632
Type
Zone
Age range
358.4–357.4
Ma
International Timescale
Mississippian
Tournaisian
Conodont Zonation
Siphonodella sandbergi-Siphonodella belkai
Siphonodella duplicata
Siphonodella sulcata
358.4
358.4
358.3
358.3
358.2
358.1
358.1
358.1
358.0
357.9
357.9
357.9
357.8
357.8
357.7
357.6
357.6
357.6
357.5
357.4
357.4
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