How can you tell the age of a river?

Related questions

1. Do any rivers flow uphill?
2. What rivers flow south?
3. Is River flows in you a classical music?
4. What rivers flow backwards?
5. Is there a waterfall that flows up?
6. What causes a river to flow backwards?
7. Do any rivers flow north?
8. What is the slowest river in the world?
9. Where do rivers flow fastest?
10. Is there a river that flows uphill?

Tags

1. #determine
2. #approximation
3. #basin
4. #rivers
5. #specific
6. #deepest
7. #deposits
8. #river
9. #determining
10. #relative
11. #absolute