| A geologic time scale combines absolute age determinations, in years, with relative age based on sequences of rock strata. |
| The geologic time scale encompasses the history of the Earth. |
| A standardized geologic time scale is the framework for deciphering and understanding the long and complex history of our planet Earth. |
| The geologic time scale was developed based on the relative ages of rock strata as determined by the early paleontologists and stratigraphers. |
| The geologic time scale was developed during the 19th century, based on the evidence of biologic stratigraphy and faunal succession. |
| At this geologic time scale, language tends to change. |
