The Proterozoic Eon began 541 million years ago, and is divided into 3 eras.

The Paleoproterozoic Era was the first era, and the era of the continents stabilization and the supercontinent's shield formation. 

Continental shields formed from crust that originated with the Earth. 

The Paleoproterozoic Era ended with the start of the Mesoproterozoic Era.

The Mesoproterozoic Era starts with major changes in the Earth's crust.

This shows the formation and expansion of layers of rock in the Earth's crust. 

Expansions of the Earth's continental plates occur due to deposition of sediments along the coasts of seas.

In the middle of the Mesoproterozoic Era

the supercontinent began to slowly break apart. 

Volcanic activity also became evident, forming huge regions of igneous rocks. 

Then following, red algae (one of the first organisms known) started to reproduce.