Katian
General info
| Belongs to |
Upper Ordovician
|
| Type | chronostratigraphy |
| Rank | Stage |
| Scope | global |
| Status | formal standard |
| Year | 2003 |
| Etymon | Katy Lake, Oklahoma, USA |
| Original locality | Black Knob Ridge outcrop |
| Age top (Ma) | 445.2 |
| Age base (Ma) | 453 |
| Date added | 2003-04-02 |
| Date changed | 2022-11-04 |
| Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age base (Ma) | Age top (Ma) | Age |
|---|---|---|---|---|---|---|---|---|---|
| Oandu Stage | DIII | O3ON |
chronostratigraphy
|
Stage
|
regional
| Vinni Subseries | 454.2 | 453.2 |
Katian
|
| Rakvere Stage | E | O3RK |
chronostratigraphy
|
Stage
|
regional
| Vinni Subseries | 453.2 | 452 |
Katian
|
| Nabala Stage | FIa | O3NB |
chronostratigraphy
|
Stage
|
regional
| Kohila Subseries | 452 | 450.8 |
Katian
|
| Vormsi Stage | FIb | O3VR |
chronostratigraphy
|
Stage
|
regional
| Kohila Subseries | 450.8 | 449.8 |
Katian
|
| Pirgu Stage | FIc | O3PRG |
chronostratigraphy
|
Stage
|
regional
| Atla Subseries | 449.8 | 445.6 |
Katian
|
| Voore Group | DIII-FIaV |
lithostratigraphy
|
Group
|
regional
| Baltic lithostratigraphy (Ordovician) |
Katian
| |||
| Vinni Subseries |
chronostratigraphy
|
Subseries
|
regional
| Viru Series | 454.2 | 452 |
Katian
|
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