| The geologic time scale was developed during the 19th century, based on the evidence of biologic stratigraphy and faunal succession. |
| Yes, it has a season that is best measured by the geologic time scale. |
| A geologic time scale combines absolute age determinations, in years, with relative age based on sequences of rock strata. |
| At this geologic time scale, language tends to change. |
| 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, which defines geological periods, began to take its modern form only in the 19th century. |
