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Macrostrat
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Clarkina longicuspidata
699
Type
Zone
Age range
254.5–254.14
Ma
International Timescale
Lopingian
Changhsingian
Wuchiapingian
Conodont Zonation
Clarkina wangi
Clarkina longicuspidata
Clarkina orientalis
254.50
254.48
254.46
254.44
254.42
254.40
254.38
254.36
254.34
254.32
254.30
254.28
254.26
254.24
254.22
254.20
254.18
254.16
254.14
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