The first 87% of geologic time is often called
A) Hadean time.
B) Pangaean time.
C) Precambrian time.
D) Proterozoic time.

Question

Quizplus · Accepted Answer

The first 87% of geologic time, which spans from the formation of the Earth about 4.6 billion years ago to the start of the Cambrian Period approximately 541 million years ago, is called Precambrian time. This vast period encompasses the Hadean, Archean, and Proterozoic eons and is characterized by the formation of the Earth, the appearance of the first life forms, and the development of the planet's atmosphere and oceans.

The First 87% of Geologic Time Is Often Called