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Macrostrat
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Clydoniceras discus
824
Type
Zone
Age range
166.2–166.1
Ma
International Timescale
Middle Jurassic
Bathonian
Ammonite Zonation - Boreal
Macrocephalites herveyi
Clydoniceras discus
Oxycerites orbis
166.20
166.19
166.19
166.19
166.18
166.18
166.17
166.16
166.16
166.16
166.15
166.15
166.14
166.13
166.13
166.13
166.12
166.12
166.11
166.10
166.10
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