An artistic reconstruction of Earth during the Hadean eon (~4.5 billion years ago). Intense volcanic activity, heat from accretion, and frequent impacts kept the young Earth in a molten state. This ...
The Nuvvuagittuq Greenstone Belt (NGB) – a complex geological sequence in northeastern Canada – harbors surviving fragments of Earth’s oldest crust, dating back to ~4.16 billion years old, according ...
) is a geologic eon of Earth history preceding the Archean. It began with the formation of the Earth about 4.6 billion years ago and ended, as defined by the International Commission on ...
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