What Is the Geologic Time Scale?

Explanations 2

• Obviously, the geologic time scale is just a scale of all time on Earth. Okay, maybe there's a little bit more to it than that. The devil is in the details. There is more to lea…

  By Wayne Zhao, Deena Hauze

• The geologic time scale is a way of estimating the age of the Earth and its major planetary events using layers of rock (strata) found in the Earth's crust and upper mantle.

  By Kyle Taylor