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Intervals
Macrostrat
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Siphonodella sulcata
631
Type
Zone
Age range
358.86–358.4
Ma
International Timescale
Mississippian
Tournaisian
Late Devonian
Famennian
Conodont Zonation
Siphonodella duplicata
Siphonodella sulcata
Siphonodella praesulcata
358.88
358.86
358.84
358.82
358.80
358.78
358.76
358.74
358.72
358.70
358.68
358.66
358.64
358.62
358.60
358.58
358.56
358.54
358.52
358.50
358.48
358.46
358.44
358.42
358.40
358.38
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