Hadean Eon
~4.54 — 4 BYA
Earth Formation
- Earth accretion and differentiation
- Magma oceans and intense volcanism
Moon
- Heavy meteoritic bombardment
- Moon formation
Liquid Water
- Early atmosphere from outgassing
- Evidence of liquid water (zircons)
- Zircon crystals and meteorites as primary evidence
Posted: Jun 21, 2026
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