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زمینشناسی و معدن::
حوضه پیش کمان
Collectively, the deep sea trench, outer ridge, and forearc basin comprise the forearc region.
The forearc basin commonly grades directly into the trench with little or no topographic rise between the two.
The forearc basin
Forearc basins are zones of crustal subsidence that
Forearc basins are underlain by either thinned continental or normal oceanic crust.
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