Hadean-time meaning

hā-dēən
The Hadean period of time.
noun
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The period of geologic time between 4.6 and 3.8 billion years ago, when the solar system was forming and the Earth was solidifying. No rocks are known from this time, as they were presumably eroded or drawn deep into the Earth and melted through the processes of plate tectonics.
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(geology) The geologic eon from about 4,600 to 3,800 million years ago; marked by the formation of the first rocks.
pronoun
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