Right after Earth was born, it is believed to have been a hostile volcanic hellscape filled with magma. The Hadean period, the first phase of our planet's life, started 4.54 billion years ago and ...

The Precambrian encompasses 86 percent of the history of Earth. As its name implies, this includes all of geological time prior to the Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian ...

Due to rapid plate tectonics and bombardment during Earth’s early history, there is no geologic rock record for the Hadean period. The oldest and most primitive mafic rocks on Earth are Archean in age ...