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Arrhaphoceras briacensis
902
Type
Zone
Age range
100.8–100.2
Ma
International Timescale
Late Cretaceous
Cenomanian
Early Cretaceous
Albian
Ammonite Zonation - Boreal
Mantelliceras mantelli
Arrhaphoceras briacensis
Mortoniceras perinflatum
100.80
100.75
100.70
100.65
100.60
100.55
100.50
100.45
100.40
100.35
100.30
100.25
100.20
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