In the geologic timescale, the Bajocian is an age of the Middle Jurassic epoch of the Jurassic period of the Mesozoic era of the Phanerozoic eon. It lasted from approximately 171.6 Ma to around 167.7 Ma (million years ago). The Bajocian age succeeds the Aalenian age and precedes the Bathonian age, all in the same epoch.

The stage takes its name from the town of Bayeux, in the region of Normandy in France.

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