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Macrostrat
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Subcraspedites primitivus
856
Type
Zone
Age range
146.4–146
Ma
International Timescale
Late Jurassic
Tithonian
Ammonite Zonation - Boreal
Subcraspedites preplicomphalus
Subcraspedites primitivus
Paracraspedites oppressus
146.40
146.38
146.36
146.34
146.32
146.30
146.28
146.26
146.24
146.22
146.20
146.18
146.16
146.14
146.12
146.10
146.08
146.06
146.04
146.02
146.00
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