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Chinese[edit]
Pronunciation[edit]
Proper noun[edit]
古元古代
- (geology) the Paleoproterozoic era (part of the Proterozoic eon, spanning from 2.5 to 1.6 billion years ago)
See also[edit]
- 中元古代 (Zhōngyuángǔ Dài)
- 元古宙 (Yuángǔ Zhòu)