Aalenian
General info
Belongs to |
Middle Jurassic
|
Type | chronostratigraphy |
Rank | Stage |
Scope | global |
Status | formal standard |
Author | Karl Mayer-Eymar |
Year | 1864 |
Etymon | Aalen, vicinity at the northeastern margin of the Swabian Alb |
Age top (Ma) | 170.9 |
Age base (Ma) | 174.7 |
Age reference | Hesselbo et al., 2020 |
Date changed | 2022-11-04 |
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