Stratigraphy
Upper Ordovician
Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age (Ma) | Age | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
Base | Top | ||||||||||
| Viru Series | chronostratigraphy | Series | regional | Baltic Ordovician | 463.8 | 452.0 | Upper Ordovician | ||||
| Keila Stage | DII | O3KL | chronostratigraphy | Stage | regional | Kurna Subseries | 456.2 | 454.2 | Upper Ordovician | ||
| Laagri Substage | DIIβ | chronostratigraphy | Substage | regional | Keila Stage | Upper Ordovician | |||||
| Ristna Substage | DIIα | chronostratigraphy | Substage | regional | Keila Stage | Upper Ordovician | |||||
| Harju Series | chronostratigraphy | Series | regional | Baltic Ordovician | 452.0 | 443.7 | Upper Ordovician | ||||
| Kurna Subseries | chronostratigraphy | Subseries | regional | Viru Series | 458.2 | 454.2 | Upper Ordovician | ||||
| Kohila Subseries | chronostratigraphy | Subseries | regional | Harju Series | 452.0 | 449.8 | Upper Ordovician | ||||
| Atla Subseries | chronostratigraphy | Subseries | regional | Harju Series | 449.8 | 443.7 | Upper Ordovician | ||||
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