Hadean Time
(hā-dēˈən, hāˈdē-)
noun The geological time period during which Earth formed, from the start of the solar system (4.6 billion years ago) until accretion, impact, and local melting led to stable Earth-Moon orbits and the oldest Earth rocks (3.8 billion years ago). Also called
Hadean Eon. See Table at
geologic time.
Origin:
Origin: AfterHades (from the intense heat during part of this period)
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