Info

Shear band cleavages

Grain/clast imbrication

Boudinage

Fold vergence

Detached intrafolial folds (transposed foliation)

Sheath folds: - plane of shearing: - plane L shear direction:

Fold vergence

Detached intrafolial folds (transposed foliation)

Sheath folds: - plane of shearing: - plane L shear direction:

Figure 8.1 1 Summary of structures produced by progressive simple shear. The marked asymmetry of these structures in sections parallel to the plane of shearing makes them reliable kinematic indicators. All structures indicate dextral simple shear. The cross sections of sheath folds at the bottom are perpendicular to the shear direction, illustrating striking difference in symmetry between the two sections.

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