Origins for Salients & Reentrants

The reasons are enumerated below:

1. Interaction with basement highs in the foreland

2. Lateral pinch-out of a stratigraphic glide horizon

3. Lateral variation in stratigraphic thickness

4. Interaction with strike-slip fault (tear faults)

5. Overlap of two non-parallel thrust belts

Impingement against an irregular cratonic margin

6. Orocline - bending