Age

Aalenian

174.7000 – 170.9000 Ma

The Aalenian is a subdivision of the Middle Jurassic Epoch/Series of the geologic timescale that extends from about 174.7 ±0.8 Ma to about 170.9 ±0.8 Ma. It was preceded by the Toarcian and succeeded by the Bajocian.

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Aalenian
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Fossil genera 66
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Parent interval
Middle Jurassic Epoch