Undeformed and deformed ooids

1
Undeformed and deformed ooids

• TM Fig. 12.6

2
Folds and Boudinage wrt. Strain orientation

• TM Fig. 12.7

3
Progressive Deformation
Pure Shear
Simple Shear

• TM Fig. 12.14/.15

4
Progressive Shear through two generationsdescrib
ed here as finite and infinitesimal

• TM Fig. 12.16

5
Progressive deformation Material lines
Lengthening then compression
Horizontal lengthening (boudinage) while vertical
shortening (folds)

• TM Fig. 12.17E, 12.18D

6
Flinn Diagram
k (a-1)/(b-1)

• TM Fig. 12.21

7
Strain analysis withinfolds
Natural Fold
Kinematic Fold Models B. Orthogonal Flexure C.
Flexural Shear D. Volume loss flexure E. Complex
compaction then (D).

• TM Fig. 15.5

8
Conjugate shear zones
s1 bisects acute angle s3 bisects obtuse angle

• TM Fig. 15.11

9
Tangent lineation diagram

• TM Fig. 15.12

10
Tangent lineation diagram

• TM Fig. 15.13

11
Discrete shear zone

• TM Fig. 15.15

12
Discrete shear and volume loss

• TM Fig. 15.16