the succession of eras, periods, and epochs as considered in historical geology.
The period of time covering the formation and development of the Earth, from about 4.6 billion years ago to today.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
While to human observers that's ancient history, in geologic time it's a blink of an eye ago.
Yeah, the difference between geologic time and human time is immense.
The age of formations is marked on a geologic calendar known as the geologic time scale.
Geologic time is subdivided into age, era and period in decreasing lengths of time involved.
Present the geologic time line in an understandable way for kids.
The fossils are arranged by geologic time period and the formations in which they are found.