| 1. The Hypothesis of Differential Erosion |
 | Introduction |
| Test the hypothesis for areas where bedrock is at or close to the surface. |
| Test the hypothesis for areas where bedrock is NOT at or close to the surface. |
| 2. The Hypothesis of Differential Deposition |
| Introduction |
| Testing the hypothesis. |
| 3. The Hypothesis of Uplift and Depression |
| Introduction |
| Devising a test for the hypothesis. |  |
