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Macrostrat
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Clarkina dukouensis
693
Type
Zone
Age range
259–258.5
Ma
International Timescale
Lopingian
Wuchiapingian
Conodont Zonation
Clarkina asymmetrica
Clarkina dukouensis
Clarkina postitteri postitteri
259.02
259.00
258.98
258.96
258.94
258.92
258.90
258.88
258.86
258.84
258.82
258.80
258.78
258.76
258.74
258.72
258.70
258.68
258.66
258.64
258.62
258.60
258.58
258.56
258.54
258.52
258.50
258.48
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