#archean

• Precambrian — Pertaining to the oldest major division of Earth's geological history, situated before the Cambrian period, comprising the Hadean, Archean, and Proterozoic eons. As a neuter noun, it represents the immense time interval from the formation of the planet (approx. 4.6 billion years ago) until the beginning of the Paleozoic era, characterized by the consolidation of the Earth's crust and the appearance of the first single-celled and simple multicellular life forms.