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زمینشناسی و معدن::
کمان آتشفشانی
The third type of convergent plate boundary represent the active continental margins where oceanic lithosphere is subducted beneath conti- nental lithosphere without a marine basin behind the volcanic arc; rather, the arc is built directly on the adjacent continent.
The continental margin is connected directly to the hinterland, although a shallow marine basin may exist behind the volcanic arc.
We use arc as shorthand for the terms volcanic arc or magmatic zone.
directly in front of the volcanic arc, lies the forearc
The volcanic arc, with an average width of
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