"Hadean Time." YourDictionary, n.d. Web. 14 December 2018. <https://www.yourdictionary.com/hadean-time>.
Hadean Time. (n.d.). Retrieved December 14th, 2018, from https://www.yourdictionary.com/hadean-time
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.