II. Subduction zones

A. Subduction zones

1. Convergent boundries, deep ocean trenches, earth's oceans, and volcanoes are all subduction zones The oceans floor doesn't just keep getting wider instead the ocean floor plunges into deep underwater canyons called deep ocean trenches.Where ever deep ocean trenches are there is subduction. Subduction is a process where the oceans floor sinks beneath a deep ocean trench and into the matle.