Alpine FaultKey surface features:• High mountain ranges (1st)• Fault line through the rock (2nd)

Internal processes:• Convection currents move the plates• Both plates colliding (destructive

plate boundary) leading to uplift• Plates sliding past each other

(transform boundary)

External processes:• Weathering by ice, water, wind, bio• Erosion

• Three processes must be linked to the surface features for E. At least one internal and one external process is needed (last one can be either).

• One of each must be linked for M. • All info must be in the context

Step one

Find/draw a diagram (cross section) to show the three ideas:• Surface features • Internal processes• External processes Annotate this diagram (around the diagram or refer to in the report).

Step two

• A description of the surface features:• Mountain ranges• Fractured rocky fault line

Step three

Explain the first internal process that has caused the mountain ranges to form.• Convection currents (explain how they occur)• Name the two plates that the sounds are found on• Link the direction of the current to how the plates

are moving • What type of plate boundaries has this caused?• When was this happening? (most recently)

Step four

Explain the second internal process that has caused the mountain ranges to form.• What type of plate boundary has this caused?• When was this happening? (most recently) • Where has uplift occurred (why did subduction not

occur?)• What type of rocks were being exposed (age type?)• CONTEXT, CONTEXT – LINK TO THE SURFACE

FEATURES

Step 5

Explain the two external processes that reduced the height of the southern alps• Weathering and erosion• The cold winters and frost cracking• Weathering due to melting snow/water • Biological and chemical weathering• Erosion of rock due to wind and water and lack of

plants• Change in the appearance over time, due to the above.