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The Alleghanian orogeny, a result of three separate continental collisions. USGS
The Alleghanian orogeny, a result of three separate continental collisions. USGS
Major fault at the dividing line between the Allegheny Plateau and the true Appalachian Mountains (Williamsport, Pennsylvania).
Major fault at the dividing line between the Allegheny Plateau and the true Appalachian Mountains (Williamsport, Pennsylvania).
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The Appalachian Mountains in the background with Penns Valley in Pennsylvania in the foreground in October 2021
The Appalachian Mountains in the background with Penns Valley in Pennsylvania in the foreground in October 2021
Appalachian Mountains broken down by physiographic division, provinces, and sections
Appalachian Mountains broken down by physiographic division, provinces, and sections
Appalachian Highlands physiographic provinces
Appalachian Highlands physiographic provinces
Appalachian Uplands of Canada's 13 divisions
Appalachian Uplands of Canada's 13 divisions