1. Faults and Mountains

2. Fault- a break along which the rock on either side moves. Hanging wall- the rock on the side of the fault that is on top of the fault (in non-vertical faults). Footwall- is the rock under the fault (in non-vertical faults). Vocabulary

3. Normal Faults- in a normal fault the hanging wall moves downward (the rock on top of the fault). Normal Faults

4. Reverse Faults- in a reverse fault the hanging wall moves upward. Reverse fault

5. Thrust Faults- a reverse fault that the plane of the fault is almost horizontal. Thrust faults

6. Strike-Slip Faults- the rock slips side to side instead of up and down. Strike-slip faults

7. Collisions between Oceanic and Continental Crust When oceanic crust subducts under the continental crust there is such a large deformation of rock that high mountains are formed. Subduction of oceanic crust causing melting at the subduction zone and the magma may erupt to form volcanic mountains. When the oceanic crust subducts pieces called terranes may be scraped off and form mountains. Plate tectonics and mountains

8. Collisions Between Oceanic Crust and Oceanic Crust Volcanoes often form where two oceanic crusts collide Plate tectonics and mountains The Mariana Islands

9. Collisions Between Continents When two continental plates collide the continental crust of either continent does not subduct. Because of this the crust is pushed UP between the two continents to form mountains like the Himalayas (where Mt Everest is). Plate tectonics and mountains