7-4c pgs IN: List and describe the 3 types of rock folding. Put your Worksheet on the box

 Fault – a break in the Earth’s crust along which blocks of the crust slide relative to one another due to tectonic forces.

NAMING FAULTS  When the ground breaks, sections are moving with respect to each other.  The ground above the fault = Hanging Wall.  The ground below the fault = Footwall.

 Normal Faults  Reverse Faults  Strike-Slip Faults

 Tensional (pulling) stress  Allows the hanging wall to slide down

 Compressional (pushing) Stress  Causes the hanging wall to move up  Stress 

 Shearing (sliding) stress causes one block to slide past the other horizontally.  Two types – right and left lateral

 Stress is still compressional (pushing), but the fault lies at a low angle.  Now the hanging wall gets pushed up and over the footwall

 tm tm

 Elasticity of the rock material  Ductile material – limestones and clays  Brittle material – sandstones and granites  Amount of stress  Speed that the stress is applied

 OUT: If a fault occurs in an area where rock layers have been folded, which type of fault is it likely to be? Why?