The period of geologic time between 4.6 and 3.8 billion years ago, when the solar system was forming and the Earth was solidifying. No rocks are known from this time, as they were presumably eroded or drawn deep into the Earth and melted through the processes of plate tectonics. See Chart at geologic time.
The Hadean Time And The Formation of The Earth
Ancient minerals fill in lost chapter of Earth’s history | Cosmos
Hadean Eon – Geologic Time Scale Project 2015-16
Geology Rocks – The Hadean Period – Fun Kids – the UK’s children’s
Liberal Dictionary English Dictionary
