1) Using a Mohr diagram representation graphically show the threshold or envelope for tensional failure, for brittle shear (Coulomb) failure and for plastic (von Mises) failure. Draw an example of a set of stress conditions in each failure regime that would allow failure. Use this construction to predict the orientation of a failure plane. In each case sketch the orientation of the failure plane in a physical block diagram.

2) Draw a cross section of a thrust fault with a flat, ramp and a flat. Make the horizontal displacement be about 1/3 the length of the fault. Finally make the section "balanced" and say what criteria you had to meet to be certain that it balanced.

3)

Given the maximum and minimum principal stresses at a point, how would you go about determining stress on any arbitrary plane. Do the maximum and minimum principal stresses at a point define the stress tensor? Contrast the meaning of a stress tensor at point and the normal and shear stresses on a plane at that point?

4) Describe the major ways in which joints form and applications of joint studies to societal and economic problems.

5) Contrast fault-bend and fault-propagation folds--with a sketch--and tell us why their geometric analysis is important both societally and economically.

6)Major classes of fault rocks include 1) breccia-gouge (including cataclastities), 2) mylonites, and 3) pseudotachylites. Indicate how you would recognize each of these major classes of fault rocks and contrast the processes operating in the fault zones that produce each.

7) Planar shear zones without bends develop related structures that allow determination of the displacement direction. Sketch a shear zone and show as many of these related structures as you can.

8) Describe the role of pore pressure in controlling deformation and relate it explicitly to total stress and effective stress.