EVERYDAY SCIENCE

Detailed explanation-1: -The Proterozoic Eon is the most recent division of the Precambrian . It is also the longest geologic eon, beginning 2.5 billion years ago and ending 541 million years ago.

Detailed explanation-2: -Earth’s history is characterized by four eons; in order from oldest to youngest, these are the Hadeon, Archean, Proterozoic, and Phanerozoic.

Detailed explanation-3: -The Archean Eon began about 4 billion years ago with the formation of Earth’s crust and extended to the start of the Proterozoic Eon 2.5 billion years ago; the latter is the second formal division of Precambrian time.

Detailed explanation-4: -2.5 billion to 543 million years ago The period of Earth’s history that began 2.5 billion years ago and ended 543 million years ago is known as the Proterozoic.