List of Figures

1. The classic 'boudin' locality

2. Geological map of the Ardennes and Northern Eifel

3. Figure modified after Hollmann and Winterfeld (1999)

4. The Dedenborn outcrop

5. Location of outcrops

6. Characteristic structures of the Eifel-Ardennes mullions

7. Small outcrop near the village of Rouette, Belgium

8. Large outcrop near Bastogne

9. Microstructure of thin quartz vein

10. Microstructure in a small mullion

11. Mullions with veins

13. Structures from the Bastogne quarry

14. Structural data

15. Stereogram

16. Histogram

17. Model for the development of mullion structures

18. Mullions calculated based on the model for flow between parallel plates