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the
Taconic Orogeny (Late Ordovician to Early Silurian) - a volcanic island arc collided with what is now the New England area. Next was the Acadian Orogeny (Late Silurian to Devonian) - a microcontinent called Avalonia collided with eastern North America. The third and most significant mountain building event was the Allegheny Orogeny (Pennsylvanian) - Africa collided with eastern North America. This was a Pangaea supercontinent formation event.
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The
Appalachians extend from Quebec to Alabama, go underground in the Mississippi River area, and re-emerge in the Arkansas-Oklahoma-Texas area as the Ouachita Mountains. The overall mountain chain formed as a result of three separate tectonic collision events during the Paleozoic. The earliest was
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The hills and mountains in the ~middle of the photo are part of Three Top
Mountain in northwestern North Carolina. Three Top Mountain is part of the Blue Ridge province, which is mostly composed of Precambrian-aged basement rocks (igneous & metamorphics). Three Top Mountain itself is composed
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The
Appalachians mostly lack the sharp-peaked mountains common to western America's Cordillera, the Andes of South America, the Alps of Europe, or the Himalayas of Asia. Compared with those geologically young mountain chains, the Appalachians are relatively old - they have been subjected to
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This is an oblique aerial view of the
Appalachians in eastern America. The Appalachian Mountains consist of three physiographic provinces. From west to east, they are: 1) the Valley & Ridge; 2) the Blue Ridge; and 3) the Piedmont.
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270:– You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/48645093051/ with UploadWizard
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If the file has been modified from its original state, some details may not fully reflect the modified file.
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The following pages on the
English Knowledge (XXG) use this file (pages on other projects are not listed):
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and was confirmed to be licensed under the terms of the cc-by-2.0.
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Three Top
Mountain (bukid sa Tinipong Bansa, North Carolina)
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long-term erosion for about one-third of a billion years.
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Add a one-line explanation of what this file represents
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https://www.flickr.com/photos/47445767@N05/48645093051/
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https://www.flickr.com/photos/47445767@N05/48645093051
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Commons is a freely licensed media file repository.
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314:. It was reviewed on 22 October 2020 by
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