What is "chaotian"

Chaotian may refer to:

• Chaotian District, in Guangyuan, Sichuan, China
• Chaotian Palace, in Nanjing, Jiangsu, China
• Chaotian Temple, in Beigang, Yunlin County, Taiwan
• Chaotian (geology), an unofficially proposed subdivision of the Hadean

In the geologic record the Chaotian eon (named after Chaos, the primeval void in Greek mythology) is unofficially proposed to denote the time preceding the solidification of the Earth's crust and the formation of Earth's moon. As proposed, it precedes the Hadean eon and is the earliest eon in Earth's history as a planet.

The end of the Chaotian was marked by the hypothetical collision of the proto-Earth and a planet-sized body named Theia, leading to the formation of the Moon.