| 释义 |
Hadean eon短语¹¹⁴⁴⁶⁷⁺⁴
基本英英
🌏冥古宙；冥古代
Noun:
the earliest eon in the history of the Earth from the first accretion of planetary material around 4,600 million years ago until the date of the oldest known rocks about 3,800 million years ago; no evidence of life |