1. 27 June 2015GLG510 Advanced Structural Geology Fold analysis and cross sections

2. Marshak and Mitra

4. Beta diagram: fold axis at intersection of bedding planes Marshak and Mitra

8. Cross sections Davis and Reynolds, 2000

9. Basic steps in the preparation of a geologic cross section: 1)Choose appropriate line of section 2)Produce topographic profile along it. 3)Transfer marker attitudes (contacts and within units) 4)Correct for apparent dip in line of section (if line <75 degrees from strike) 5)Draw units; maintain stratigraphic thickness where possible; use deformation patterns observed from field to guide interpretation. Continue lines into air and below ground Davis and Reynolds, 2000

10. Construction: Busk method Marshak and Mitra

11. Construction: Busk method Marshak and Mitra

12. Construction: Kink band method Marshak and Mitra

13. Construction: Kink band method Marshak and Mitra