11. The aulacogen underwent crustal shortening and inversion sometime in the listric thrust faults . 12. But if it is a truly blind thrust fault , they won't find any. 13. The Los Lobos thrust fault complex demarcates the western boundary of the field. 14. The original date of the Roberts Mountains thrust fault was post-Paleozoic. 15. Thrust faults form nappes and klippen in the large thrust belts.16. If that's true, Lettis said, it could rewrite the book on blind thrust faults . 17. Known as blind thrust faults , they are the Los Angeles region's " worst nightmare," 18. These formations occur because anticlinal ridges typically develop above thrust faults during crustal deformations. 19. Detachment faults may also initiate on reactivated thrust fault surfaces. 20. This could have caused the Charleston thrust fault to reactivate as an extensional fault.