Aalenian Stage
Early Middle Jurassic
Early Middle Jurassic
The Aaleanian Age (174–170 Ma) is the first age in the Middle Jurassic Epoch of the Jurassic Period of the Mesozoic Era. It occurs after the Toarcian Age, and before the Bajocian Age.
Geologic Age
Geologic Age
174.1±1.0–170.3±1.4 Ma
Eon / Era / Period / Epoch
Eon / Era / Period / Epoch
What happened during this time?
What happened during this time?
Many gymnosperm groups present
Conifers (including Cheirolepidaceae)
