Middle Ordovician
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Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age (Ma) | Age | |||
---|---|---|---|---|---|---|---|---|---|---|---|
Base | Top | ||||||||||
Volkhov Stage | BII | O2VL | chronostratigraphy | Stage | regional | Ontika Subseries | 471.8 | 467.5 | Middle Ordovician |
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Browse Geocollections
Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age (Ma) | Age | |||
---|---|---|---|---|---|---|---|---|---|---|---|
Base | Top | ||||||||||
Volkhov Stage | BII | O2VL | chronostratigraphy | Stage | regional | Ontika Subseries | 471.8 | 467.5 | Middle Ordovician |