Margins Flashcards
Where are dense oceanic plates formed, destroyed and why? (Margins tectonics)
- formed = ocean ridges
- destroyed = ocean trenches
- there is a balance between the rate of creating and destroying - meeting an equilibrium
What way do constructive plates move and what happens? (Margins tectonics)
Away from each other and new crust is made
What way do destructive plates move and what happens? (Margins tectonics)
Towards each other and crust is destroyed
What way do conservative plates move and what happens? (Margins tectonics)
Past each other where no crust is formed or destroyed
Where is there a constructive plate boundary? (Margins tectonics)
Between African and South American plates
Where is there a destructive plate boundary? (Margins tectonics)
Between the Nazca and South American plates
Where is there a conservative plate boundary? (Margins tectonics)
Between the Pacific and North American plates
Each plate is part of … Floating on the … (Margins tectonics)
Lithosphere
Asthenosphere
