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  2. Appalachian Mountains - Wikipedia

    en.wikipedia.org/wiki/Appalachian_Mountains

    The Appalachian Mountains, [b] often called the Appalachians, are a mountain range in eastern to northeastern North America. The term "Appalachian" refers to several ...

  3. Geology of the Appalachians - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Appalachians

    Paleogeographic reconstruction showing the Appalachian Basin area during the Middle Devonian period. [9] The "Pennsylvania Salient" in the Appalachians appears to have been formed by a large, dense block of mafic volcanic rocks that became a barrier and forced the mountains to push up around it. 2012 image from NASA's Aqua satellite.

  4. Appalachia (landmass) - Wikipedia

    en.wikipedia.org/wiki/Appalachia_(landmass)

    During most of the Late Cretaceous (100.5 to 66 million years ago) the eastern half of North America formed Appalachia (named for the Appalachian Mountains), ...

  5. Alleghanian orogeny - Wikipedia

    en.wikipedia.org/wiki/Alleghanian_orogeny

    The Alleghanian orogeny, a result of three separate continental collisions. USGS. The immense region involved in the continental collision, the vast temporal length of the orogeny, and the thickness of the pile of sediments and igneous rocks known to have been involved are evidence that at the peak of the mountain-building process, the Appalachians likely once reached elevations similar to ...

  6. Appalachian Trail - Wikipedia

    en.wikipedia.org/wiki/Appalachian_Trail

    The Appalachian Trail, also called the A.T., is a hiking trail in the Eastern United States, extending almost 2,200 miles (3,540 km) between Springer Mountain in Georgia and Mount Katahdin in Maine, and passing through 14 states. [2]

  7. Appalachia - Wikipedia

    en.wikipedia.org/wiki/Appalachia

    Appalachia (locally / ˌ æ p ə ˈ l æ tʃ ə /, also /-l eɪ tʃ ə,-l eɪ ʃ ə / [4]) is a geographic region located in the central and southern sections of the Appalachian Mountains in the eastern United States.

  8. Hikers urged to avoid parts of Appalachian Trail after Helene ...

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  9. Timeline of the American Old West - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_American...

    British, French, and Russian claims followed in the 18th and 19th centuries, though these did not result in settlement and the region remained in Spanish hands. After the American Revolution , the newly independent United States began securing its own frontier from the Appalachian Mountains westward for settlement and economic investment by ...