1. Stress, Folding and Faulting
2/27/2019

2. Rock Reaction When Stressed “Stress and Strain”
Warm Rocks are Pliable (Ductile Deformation) so they tend to bend and fold.
Cool Rocks are Brittle so they tend to fracture (no relative movement) and fault (movement from existing rock).

3. Compression = Heat = Rocks Tend to Fold

5. Folded Rocks syncline anticline
Where are the oldest rocks exposed at the surface?
anticline

6. anticlines

7. Anticline

8. synclines

9. Syncline

10. Folded Rocks monocline
rock has a gently dipping bend in the horizontal rock layer.
monocline

13. Strike-Slip Fault

14. Strike-slip (Transform) Fault

15. Strike-Slip Fault

16. Strike Slip Fault

19. Normal Fault

20. Normal Fault

22. Reverse Fault

23. Graben Fault (Rift Valley)
Formed from two normal faults.

24. Graben Fault

25. Formed from two reverse faults.
Horst Fault
Formed from two reverse faults.