2. Thrust Faults

3. What kind of fault is it? Precambrian Paleozoic

4. How Thrust belts form

5. Thrust Belt in a Sandbox

6. Parts of a Thrust-Belt

7. Components of a thrust belt forethrust Backthrust Basal Detachment Basement

8. Origin of Foreland Basins

9. Asia Topography

11. Sevier Thrust Belt, Wyoming Complex Imbricate fan Basement involved def. Thin-skin def.

12. Appalachians

13. Sequence of deformation Forward propagation of deformation front 1 1 1 1 2 2 2 3 3

14. Canadian Rockies Mountain Front

15. Faults of the Canadian Rockies

16. Bow and arrow rule

17. Distribution of Shortening

18. Mt. Yamnuska, Canadian Rockies- McConnell Thrust

19. Cretaceous foreland basin strata Cambrian limestone

20. Dev. Limestone Palliser Fm. Cretaceous, Belly River Gp. Lewis Thrust

21. Folded Paleozoic Rocks of the Sawback ranges

22. Front Ranges E W

23. E W Rundel Thrust Pz limestone Jur-K Kootenay Fm.

24. Detached folds- Jura Mts. Salt Detachment surface

25. Calico Bluff, Eagle, AK Pop-up Structure- A Faulted Fold

26. Thrust Breaching the Surface- Landers, CA

29. Geometry of Thrust Sheets The shape of the fault plane determines the geometry of the folds

30. The hanging wall conforms to the shape of the footwall

31. Fault-bend-fold Progression

32. Thrust belt movie

33. Termination of fault-related fold

35. Fault-related Folding

37. Duplex

38. Thrust belt movie

39. Duplex Spacing

40. Duplex Structure in thin-bedded sandstones and shales

41. Fault- propagation fold The fault grows as displacement grows

42. Map patterns Complicated due to erosion of the thrust sheets

43. Mechanical Paradox of Thrust Sheets Stress required to move a thrust sheet is larger than the strength of the rock Like trying to push a Jell-O block across the table

44. Solutions: 1.Reduce Basal Friction  High fluid Pressure 2.The sheet does not move all at once

45. Role of Fluid Pressure

46. Like pushing a wrinkle out of a rug

47. Critical Wedge Growth

51. Keystone thrust fault, southern Nevada B B D D