A Subduction Margin in One Rock Section

Illustrate an oceanic plate descending beneath a continental margin in a horizontal cross-section. Place the trench offshore where the plate bends, shallow earthquakes near the contact, and deeper events along the descending slab. Put the volcanic arc inland above the slab and separate the crust and mantle with simple color fields. Keep arrows thin and leave margins for labels and a note that the vertical scale is exaggerated.

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