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Alpine Fault

Alpine Fault. Key surface features: High mountain ranges (1 st ) Fault line through the rock (2 nd ) Internal processes: Convection currents move the plates Both plates colliding (destructive plate boundary) leading to uplift Plates sliding past each other (transform boundary)

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Alpine Fault

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  1. Alpine Fault Key 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

  2. 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).

  3. Step two • A description of the surface features: • Mountain ranges • Fractured rocky fault line

  4. 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)

  5. 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

  6. Step 5 Explain the twoexternal 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.

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