A division on the geologic time scale represents ____.
A) the passage of 500,000 years.
B) the passage of 250 million years
C) an increase in reptilian poopulation by 100,000
D) an increase in population of all living organisms by one million
E) a distinctive event in the rock record

Question

Quizplus · Accepted Answer

A division on the geologic time scale represents a distinctive event in the rock record, such as a major extinction event, the appearance of a new species, or a significant change in the environment. It is not based on a specific amount of time or population increase.

A Division on the Geologic Time Scale Represents ____