Answers

2016-06-22T12:37:37+08:00
It will sink like a boat. watch hajime no ippo for more information
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2016-06-22T17:01:37+08:00
Plate A - oceanic plate
plate B - continental plate

the leading edges of plate A would sink to plate B because its more denser and thinner compare to continental plate. the edges continue to move downward to the mantle and due to the mantle's high temperature it would melt.
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