Plate Margins Flashcards
What is a destructive plate margin?
A destructive plate margin is formed where the oceanic plate meets the continental plate, and undergoes subduction due to the greater density of oceanic crust. As it is subducted, the oceanic plate melts within the mantle, creating convection currents in the molten magma in the asthenosphere (area beneath the crust). And it creates volcanoes
What is a constructive plate margin?
At a constructive plate margin. the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new land in the form of a shield volcano. The movement of the plates over the mantle can cause earthquakes.
What is a conservative plate margin?
At a conservative plate margin close conservative plate marginAreas between two crustal plates that are moving past each other in opposite directions or at different speeds., the plates move past each other or are side by side moving at different speeds. As the plates move, friction occurs and plates become stuck.
What is a collision plate margin?
If two continental plates collide, neither can sink and so the land buckles upwards to form fold mountains. This is called a collision margin.
What is a plate margin?
Plate boundaries are the edges where two plates meet. Most geologic activities, including volcanoes, earthquakes, and mountain building, take place at plate boundaries.
