Which of the following is not expected very often near a "textbook" subduction zone (that is, near a subduction zone that is so perfect and free of confusing complications that you would use it in a textbook to teach students)? Explosive volcanoes fed by melt from the slab being subducted. Push-together earthquakes and faults as the subducting slab squeezes the rocks. Slide-past (or transform, with horizontal but no vertical movement) earthquakes and faults such as the San Andreas. Piles of sediment scraped off the slab being subducted. Stratovolcanoes formed by explosions and lava from the slab being subducted.

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