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Intervals
Macrostrat
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NJ5
361
Type
Zone
Age range
186.25–183.52
Ma
International Timescale
Early Jurassic
Toarcian
Pliensbachian
Calcareous Nannoplankton Zones
NJ6
NJ5
NJ4
186.2
186.0
185.8
185.6
185.4
185.2
185.0
184.8
184.6
184.4
184.2
184.0
183.8
183.6
183.4
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