Download Subduction and Convergent Margains

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(1) Typically, Oceanic Crust (A), will be subducted back into the Mantle (B).
(2) Downgoing Crust and nearby Mantle are partially melted to
(3) produce Magma (C) which rises producing a Volcanic Arc (D).
(4) The boundary between the slab and the upper plate is a thrust fault (F).
Earthquakes are common, deep, and strong here.
(5) Sediment on the slab (E)
(6) is scraped off
and tectonically
kneaded into an
Wedge at the
Trench (F).
(7) Sediment from
the arc is
trapped in the
fore-arc basin
(8) and the back-arc
The Aleutian and Philippine islands are Volcanic Arcs.