Synonym for Priscoan eon

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)

Synonym for Priscoan eon

Hadean Hadean aeon Hadean eon Hadean time Priscoan Priscoan aeon

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