20.10.1. Faults

Try these first

1. 1.

   Define a normal fault.

   Hint

   Think about how the Earth's crust stretches.

2. 2.

   What type of stress causes a reverse fault?

   Hint

   Consider what happens when layers of rock are squeezed together.

3. 3.

   What movement characterizes a normal fault?

   • Upward
   • Downward
   • Lateral

   Hint

   Think about how tension affects the crust.

4. 4.

   True or False: Strike-slip faults are caused by compressional stress.

   • True
   • False

   Hint

   Consider what happens when forces push in opposite directions.

5. 5.

   Given the following scenarios, classify each as a normal, reverse, or strike-slip fault: a landscape being pulled apart in a rift valley; a mountain range created by colliding tectonic plates; two rocks sliding past each other.

   Hint

   Focus on the stress types and relative motion of the blocks.

6. 6.

   Discuss the implications of strike-slip faults such as the San Andreas Fault on urban planning in nearby cities.

   Hint

   Think about how earthquakes impact infrastructure and safety.