Hirnantian
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Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age (Ma) | Age | |||
---|---|---|---|---|---|---|---|---|---|---|---|
Base | Top | ||||||||||
Porkuni Stage | FII | O3POR | chronostratigraphy | Stage | regional | Atla Subseries | 445.6 | 443.7 | Hirnantian |
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Browse Geocollections
Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age (Ma) | Age | |||
---|---|---|---|---|---|---|---|---|---|---|---|
Base | Top | ||||||||||
Porkuni Stage | FII | O3POR | chronostratigraphy | Stage | regional | Atla Subseries | 445.6 | 443.7 | Hirnantian |