Is the geologic time scale useful?

The Geologic Time Scale divides the past of Earth, into intervals marked by a distinctive set of fossils recorded in the stratigraphic units. read more

The Geologic Time Scale divides the past of Earth, into intervals marked by a distinctive set of fossils recorded in the stratigraphic units. The International Commission on Stratigraphy is the organization that is responsible for maintaining and updating the chronological division of rocks and thereby, the Geologic Time Scale on a global scale. read more

Geologic time scale. The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time, and is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history. read more

The 4.55 billion-year geologic time scale is subdivided into different time periods of varying lengths. All of Earth history is divided into two great expanses of time. The Precambrian began when Earth first formed 4.55 billion years ago and ended about 570 million years ago. read more