Plate Margins
Geography plate tectonice and margins mindmap
- Created by: Ben Whitbourn
- Created on: 26-03-13 10:02
View mindmap
- Plate Margins
- Collision
- Convection currents opposite directions into each other
- Causes fold mountains however take a while
- However due to constant movement frequent earthquakes formed (can be very severe)
- Causes fold mountains however take a while
- Only when to continental plates collide
- As plates are the same density they crumble in upward direction
- EXAMPLE- Himalayas, Eurasian crashed with the Indian Plate.
- As plates are the same density they crumble in upward direction
- Convection currents opposite directions into each other
- Destructive
- Convection currents in opposite directions towards each other
- Oceanic and continental plate
- As oceanic is more dense it sinks
- This motion creates a subduction zone, a deep sea trench.
- Also triggering severe earthquakes
- Oceanic plate melts as gets deeper forming magma chamber
- This motion creates a subduction zone, a deep sea trench.
- EXAMPLE- Andes Mountains, Nazca plate went underneath South American plate
- Volcanoes also formed, as oceanic plate sub ducts takes water and other volaties with it which lowers the melting point.
- Newly formed magma is light and and rises to he top of the mantle breaking through crust forming volcanoes
- Silica picked up on the way makes magma more viscous
- Newly formed magma is light and and rises to he top of the mantle breaking through crust forming volcanoes
- Convection currents in opposite directions towards each other
- Conservative
- When plates are forced to slide past one another
- Although crust isn't formed or destroyed at this point earthquakes can occur if the plates stick
- When this happens pressure builds up, one plate jerks and shockwave sent to surface.
- Although crust isn't formed or destroyed at this point earthquakes can occur if the plates stick
- EXAMPLE - San Andreas fault (California) American plate moves slowly past Pacific plate
- When plates are forced to slide past one another
- Collision
- Constructive
- Plate Margins
- Collision
- Convection currents opposite directions into each other
- Causes fold mountains however take a while
- However due to constant movement frequent earthquakes formed (can be very severe)
- Causes fold mountains however take a while
- Only when to continental plates collide
- As plates are the same density they crumble in upward direction
- EXAMPLE- Himalayas, Eurasian crashed with the Indian Plate.
- As plates are the same density they crumble in upward direction
- Convection currents opposite directions into each other
- Destructive
- Convection currents in opposite directions towards each other
- Oceanic and continental plate
- As oceanic is more dense it sinks
- This motion creates a subduction zone, a deep sea trench.
- Also triggering severe earthquakes
- Oceanic plate melts as gets deeper forming magma chamber
- This motion creates a subduction zone, a deep sea trench.
- EXAMPLE- Andes Mountains, Nazca plate went underneath South American plate
- Volcanoes also formed, as oceanic plate sub ducts takes water and other volaties with it which lowers the melting point.
- Newly formed magma is light and and rises to he top of the mantle breaking through crust forming volcanoes
- Silica picked up on the way makes magma more viscous
- Newly formed magma is light and and rises to he top of the mantle breaking through crust forming volcanoes
- Convection currents in opposite directions towards each other
- Conservative
- When plates are forced to slide past one another
- Although crust isn't formed or destroyed at this point earthquakes can occur if the plates stick
- When this happens pressure builds up, one plate jerks and shockwave sent to surface.
- Although crust isn't formed or destroyed at this point earthquakes can occur if the plates stick
- EXAMPLE - San Andreas fault (California) American plate moves slowly past Pacific plate
- When plates are forced to slide past one another
- Collision
- Caused by convection current in the mantle
- Convection Current travel different directions causing plates to move away from each other
- Earthquakes made but very shallow and not big
- EXAMPLE- mid atlantic ridge, Eurasion plate moved away from North American
- Magma rises through gap and cools
- This causes a new oceanic crust to form which then makes volcanoes
- Tend to be less severe as no silica mixed in to the magma
- This causes a new oceanic crust to form which then makes volcanoes
- Plate Margins
Comments
No comments have yet been made