GENERAL GEOLOGY

Detailed explanation-1: -The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called-in descending order of duration-eons, eras, periods, epochs, and ages.

Detailed explanation-2: -The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth’s history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years).

Detailed explanation-3: -Some examples of events listed on the geologic time scale include the first appearance of plant life on Earth, the first appearance of animals on Earth, the formation of Earth’s mountains, and the extinction of the dinosaurs.

Detailed explanation-4: -Answer and Explanation: The geologic history of the Earth is recorded in the rocks that formed it, which is the geologic record.