Question
What is geological time scale? How is it divided ?
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Answer
- Geological time scale is the arrangement of major divisions of geological time into eras, periods and epochs on the time scale.
- This division is based on the study of fossilized organisms obtained from the different strata of the earth.
- The characteristic significant events that occurred in the organization of organisms helped the geologists to understand the geological time scale.
- The major divisions of geological time are called eras.
- The eras are divided into periods and the periods into epochs.
- By studying fossils in the earth crust, the evolutionary changes in the organisms have been traced out.
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