Middle Jurassic Epoch
Mesozoic:
Jurassic Period		 The Aalenian Age
Middle Jurassic Early Jurassic Triassic Middle Jurassic
Bajocian Late Jurassic Cretaceous Mesozoic Timescale

The Aalenian

The Aalenian Age of the Middle Jurassic Epoch: 175.6 to 171.6 million years ago

Phanerozoic
  Mesozoic
    Jurassic
        Early Jurassic
        Middle Jurassic  
            Aalenian Age
            Bajocian Age
            Bathonian Age
            Callovian Age
        Late Jurassic  
    Cretaceous

The Aalenian Age
 
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