Final answer:
During an Oceanic-oceanic convergence, one plate usually subducts beneath the other plate. Along a transform plate boundary, two plates slide past each other horizontally.
Step-by-step explanation:
In an Oceanic-oceanic convergence, when two plates converge, one of the plates usually subducts under the other plate. The denser plate, which is usually older and cooler, will subduct beneath the less dense plate. The subducting plate will melt and recycle back into the mantle. This process can lead to the formation of volcanic arcs and trenches.
Along a transform plate boundary, two plates slide past each other horizontally. Tectonic plates move horizontally in opposite directions or in the same direction but at different speeds. This movement often results in earthquakes as the plates are locked and then suddenly slip past each other.
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