Summary of Stress and Structures:

A. Stress can be either:

1. Compressional.
2. Tensional.
3. Shear.

B. Strain can be BRITTLE or DUCTILE (plastic).

1. IF BRITTLE:

   a. Faults:

i. Strike Slip (movement in strike direction), caused by SHEAR stress.

ii. Dip Slip (movement in vertical (dip) direction).

** Can be either:

• Normal dip slip (caused by Tensional stress)

• Reverse dip slip (caused by Compressional stress)

2. IF DUCTILE (plastic):

a. Folds (caused by slow application of COMPRESSIONAL stress):

i. Anticlines (either non-plunging or plunging).

ii. Synclines (either non-plunging or plunging).