Faulting and Folding
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What is the crust exposed to along plate boundaries?
Enormous forces
What are the three types of forces deforming the crust?
Compressive Tensional Shearing
How does a fold form?
When pressure is exterted inwards from both sides.
What does the Earth need to be for it to fold?
Pliable (flexible and easily bent)
What are folds that bend upwards called?
Anticlines
What are folds that bend downwards called?
Synclines
True or False. Folds are usually formed below the Earth.
True
Give an example of folding.
The Great Dividing Range.
Describe the process of folding that forms fold mountains.
At a convergent plate boundary, the continental crust is squashed together and forced upwards.
Give 2 examples of fold mountains.
The Himalayas and the Alps
How does a fault occur?
When there is movement along a crack.
What is it called when the movement along a fault is sideways?
Slip fault
How do faults form?
When the stresses overcome the internal strength of the rock resulting in a fracture.
Explain the description method known as a fault plane.
A fault can be defined as the displacement of once connected blocks of rock along a fault plane.