Plate Margins Flashcards
Destructive plate margin
Plate movement
Plates come together
Explanation of name
Destructive plate margin
Crust is destroyed
Processes of destructive plate margin
When plates meet, the oceanic plate is forced to bend and go down into the mantle beneath the other plate. This is called subduction and it triggers earthquakes.
Friction and the heat of the mantle melt the descending plate, forming magma. The magma rises and forms volcanoes on the continental plate
Features of a destructive plate margin
Earthquakes
Volcanoes
Fold mountains
Ocean trench
Constructive plate margin movement
Plates move apart
Explanation of name
Constructive plate margin
New crust if formed
Processes of a Constructive plate margin
Two plates move apart, molten rock or magma rises from the mantle to fill the gap, forming new crust
Features of a Constructive plate margin
Earthquakes
Volcanoes
Mid-ocean ridge
Conservative plate margin
Plate movement
Plates slide past each other
Explanation of name Conservative plate margin
Crust is not destroyed or added too
Processes of a Conservative plate margin
Two plates slide past each other, along a fault line. Friction between them means that they tend to stick until pressure builds up and is released in a sudden jerking movement: an earthquake
Conservative plate margin features
Earthquakes
Volcanoes
Collision zones
When two collision plates meet there is a head on collision. Sediment from the seafood were folded and lifted up making fold mountains.
Sometimes magma starts to rise through the mountains but cools before it reaches the surface making instrusive igneous rock underground. Earthquakes are common because so much rock movement is going on
