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A series of horses bounded by a roof thrust and a floor thrust. There are three main types of compressional duplexes: hinterland dipping; foreland dipping; and antiformal stacks. There are also extensional duplexes in normal dip-slip regimes. Duplex terminology has also been applied to strike-slip terrains where smaller en échelon features bound by two continuous, major fault zones form a strike-slip complex. In strike-slip regimes extensional and compressional duplexes may coexist.

Subjects: Earth Sciences and Geography.

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