1. Geologic Time Scale An Introduction to Clock Era Prepared by: Ms Cristobal Class: I - Gold

2. Analog Clock Circular time line Hands of the Clock Intervals (hour or minutes)

3. Clock of Eras

4. HADEAN

5. ARCHAEAN

6. Time line

7. HADEAN 1 12 2 3 4 5 6 8 9 7 10 11

8. 1 12 2 3 4 5 6 8 9 7 10 11