known as the Hadean, Earth was fresh and piping hot, with an ammonia-and-methane atmosphere imbued with enough water to eventually condense into a planet-wide ocean. During this period ...

The Hadean Eon, named after Hades, the Greek god who ruled the underworld, was the unofficial time period that began with the formation of Earth. Its name – which also derives from the Hebrew ...

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The Precambrian encompasses 86 percent of the history of Earth. As its name implies, this includes all of geological time prior to the Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian ...

Due to rapid plate tectonics and bombardment during Earth’s early history, there is no geologic rock record for the Hadean period. The oldest and most primitive mafic rocks on Earth are Archean in age ...

For instance, at the end of the Permian period, a mass extinction ... To some researchers, this suggests Earth's crust may have been recycling in the Hadean. Water weakens the crust, creating ...