Geologic Time is a crucial concept to understanding the history of the earth—including the evolution of life. Many different representations of the timeline have been created, and many approaches ...

This involves creating timelines of geological events and understanding the sequence of changes. Middle School (6-8) MS-ESS1-4: Construct a scientific explanation based on evidence from rock strata ...

"Despite its rejection as a formal unit of the Geologic Time Scale, Anthropocene will nevertheless continue to be used not only by Earth and environmental scientists, but also by social scientists ...

Dividing up deep time The geologic time scale provides the official framework for our understanding of Earth’s 4.5 billion-year history.

The Geologic Time Scale-- all 4.56 billion years of it -- is the way Earth scientists converse about time. It started off based on the relative occurrence of fossils and the periods were named after ...

But to merit inclusion on the geological scale, any time interval needs to meet certain criteria, such as having a clear, objective starting point in the mineral record.

Understanding the geologic time scale and how to organize Earth’s history into a coherent timeline. MS-LS4-1: Analyze and interpret data for patterns in the fossil record that document the existence, ...

Dividing up deep time The geologic time scale provides the official framework for our understanding of Earth’s 4.5 billion-year history.