Destructive Plate Margins Flashcards

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1
Q
  1. What happens when continental plates meat oceanic plate? (convergent plate boundaries)
  2. what features form?
  3. example
A
  1. Subduction happens as the more dense oceanic plate subducts underneath as the less dense oceanic has more bouncy, so floats
    • Deep sea trenches
      - fold mountains
      - benioff zone
      - at benioff zone has intermediate and deep earthquakes
      - at benioff zone forms volcanic eruptions
  2. Andes mountains
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2
Q
  1. What happens when oceanic meets oceanic plates? (convergent plate boundaries)
  2. What features form?
  3. Example
A
  1. subduction the more dense oceanic plate subducts underneath the the less dense oceanic plate
  2. forms underwater volcanoes which can from island arcs if the come above sea level
    produces shallow-to-deep focus earthquakes
    3.Aleutain Island
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3
Q
  1. What happens when continent plate meets a continent plate ( convergent plate boundaries)
  2. What feature form
  3. Example
A
  1. collision plate boundaries
    2.high fold mountains
    maybe some subduction so earthquakes can happen with a shallow focus which will increase their severity 3.Himalayas, Nepal earthquake 2015
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4
Q
  1. Constructive plate boundary what is it?
  2. what features occur?
  3. Example
A
  1. when two plates divide so new crust is formed
    • earthquakes
      -submarine volcanoes can form new island arcs if they grow above sea level e.g. Iceland on Mid-Atlantic ridge IF THIS HAPPENS BETWEEN TWO OCEANIC CONTENTS
      If content to content a volcanoes will form
      3.East African rift valley, red sea of content to content
      Mid-Atlantic ridge is ocean to ocean
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5
Q
  1. What is a Conservation plate margins?
  2. What features form?
  3. Example
A
  1. Whn plates slide past each other
  2. Forming shallow-focus earthquakes
  3. San Andras fault
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