The eon's name "Hadean" comes from Hades, the Greek god of the underworld, referring to the hellish conditions then prevailing on early Earth: the planet had just been formed from recent …

The Archean Eon was preceded by the Hadean Eon, an informal division of geologic time spanning from about 4.6 billion to 4 billion years ago and characterized by Earth’s initial …

The Hadean Eon, named after the Greek god and ruler of the underworld, Hades, is the oldest eon and dates from 4.6-4.0 billion years ago. This time represents Earth’s earliest history, …

It is the unofficial geological period of time that lies just before the Archean time period. The Hadean began with the formation of the Earth roughly 4.5 billion years ago (Ga) and ended …

Hadean time is not a geological period as such. No rocks on the Earth are this old - except for meteorites. During Hadean time, the Solar System was forming, probably within a large cloud …

Aug 31, 2025 · The Hadean Eon marks the earliest period in Earth’s history. It represents the foundational stage following planet formation, laying the groundwork for all subsequent …

May 21, 2024 · The Hadean eon refers to the earliest geological epoch of Earth’s history, from the formation of the planet about 4.5 billion years ago, to the beginning of the Archean period, 3.8 …

The Hadean Eon, named after the Greek god and ruler of the underworld, Hades, is the oldest eon and dates from 4.6-4.0 billion years ago. This time represents Earth’s earliest history, …

A barrage of particularly large impacts known as the Late Heavy Bombardment represents the climax of this violent era. No life forms are known from this eon. The early atmosphere …

The Hadean was originally defined as the birth of the planet occurring 4.0 billion years ago and preceding the existence of many rocks and life forms. However, geologists have dated …