Geological age
Early Ordovician
| item | description | ||||||
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| @id | https://gbank.gsj.jp/ld/resource/geoltime/item/GEOAGE_135030000 | ||||||
| Name | Early Ordovician | ||||||
| Rank | Epoch | ||||||
| Upper age (Ma) | 471.3 ±1.4 | ||||||
| Lower age (Ma) | 486.85 ±1.5 | ||||||
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