Constructive plate boundaries annotated diagram and explanation

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=-g7QjMI8cXw

Detailed explanation of how convection currents in the mantle drag the tectonic plates away from each other creating a gap from which laval can rise. A prime example is the mid atlantic ridge which runs all the way through Iceland. • Please visit my teaching website: http://www.thegeographeronline.net

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