GEOLOGICAL TIME SCALE

Geological Time Scale has been broadly divided into six major divisions known as ERAS .. They also mark definite breaks in the geological and fossil records and divide an era into PERIODS , EPOCHS ETC ....

EONS :-

           Geological Time Scale has 4 EONS ....

1. HADEAN

2. ARCHAEN

3.PROTEROZOIC

4.PHANEROZOIC

ERAS :-

            Geological Time Scale has 6 ERAS

1. HADEAN

2. ARCHAEN

3.PROTEROZOIC

4. PALAEOZOIC

5. MESOZOIC

6. CAINOZOIC

PERIODS :-

             HADEAN - HADEAN PERIOD 

             ARCHAEN - ARCHEAN PERIOD 

             PRE CAMBRIAN - PRE CAMBRIAN PERIOD

             PALAEOZOIC - IT HAS 6 PERIODS 

1. CAMBRIAN PERIOD

2. ORDOVICIAN PERIOD

3. SILURIAN PERIOD

4. DEVONIAN PERIOD

5. CARBONIFEROUS  PERIOD

6. PERMIAN PERIOD

             MESOZOIC - IT HAS 3 PERIODS

1. TRIASSIC PERIOD

2. JURASSIC PERIOD

3. CRETACEOUS PERIOD 

            CAINOZOIC - IT HAS 1 PERIOD 

1. TERTIARY PERIOD ....

           IN THIS PERIOD HAS 5 EPOCHS .....

1. PALAEOCENE EPOCH

2. EOCENE EPOCH

3. OLIGOCENE EPOCH

4. MIOCENE EPOCH

5. PLIOCENE EPOCH

                  EVENTS AND CHANGES HAS IN THE IMAGE ....