Why do geologists need a geologic time scale? Give 2 reasons.

Explanation: It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history. Like the periodic table, the Geologic time scale is one of those amazing human endeavors to turn a vast amount of evidence from astronomy, rocks, fossils, history and politics into a nifty little diagram which makes the whole thing appear nice, neat and resolved.

Answer:The main reason to use a geologic time scale is so that geology in a given place can be given a location in time.

Explanation: (here is the only one i could find)