The Appalachian Fold Belt: Paleozoic Structural Grain Controlling Modern Hydrological Divide and Landform Evolution
阿巴拉契亚褶皱带：古生代构造走向控制现代水文分界与地貌演化
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The Appalachian Mountains preserve a 300-million-year-old structural grain formed by the Alleghenian orogeny’s east-west compression.
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Modern rivers like the Tennessee and Susquehanna follow valleys aligned with eroded anticlines rather than random paths.
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