Early Jurassic Epoch
Jurassic Period
The Hettangian Age

The Hettangian

The Hettangian Age of the Middle Jurassic Epoch: 199.6 to 196.5 million years ago

        Early Jurassic
            Hettangian Age
            Sinemurian Age
            Pliensbachian Age
            Toarcian Age
        Middle Jurassic  
        Late Jurassic  

The Hettangian Age

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