Appalachians

Appalachians
J Guth · CC BY-SA 3.0 · source
Name	Appalachians
Country	United States; Canada
States provinces	Maine; New Hampshire; Vermont; Massachusetts; Connecticut; New York; New Jersey; Pennsylvania; Maryland; West Virginia; Virginia; North Carolina; Tennessee; South Carolina; Georgia
Length km	2,400
Highest	Mount Mitchell
Elevation m	2037

Appalachians The Appalachians form a vast mountainous region in eastern North America spanning parts of Canada and the United States. Centered on a series of ranges including the Blue Ridge Mountains, the Green Mountains, the Allegheny Mountains, and the Great Smoky Mountains, the region has distinctive landscapes, long geological history, and deep cultural connections to peoples such as the Cherokee and settlers from Scotland and Ireland. The chain has influenced transport corridors like the Great Wagon Road and infrastructure projects including the Erie Canal and the Birkhead Tunnel.

Geography

The Appalachians extend from Newfoundland and Labrador and Labrador through Nova Scotia into the eastern United States, terminating in Alabama and Georgia. Major physiographic provinces include the Appalachian Plateau, the Ridge-and-Valley Appalachians, the Blue Ridge Physiographic Province, and the New England Province. Principal rivers draining the range include the Hudson River, the Susquehanna River, the Ohio River, the Potomac River, and the Tennessee River. Cities and urban regions adjacent to the mountains include Pittsburgh, Charleston, Asheville, and Roanoke. Transportation corridors have historically followed gaps at locations such as Cumberland Gap and passes used by routes like the Chesapeake and Ohio Canal.

Geology and Formation

The Appalachians originated during the Paleozoic era through a sequence of orogenic events including the Taconic orogeny, the Acadian orogeny, and the Alleghanian orogeny associated with the assembly of Pangaea. Bedrock includes shale, sandstone, limestone, and metamorphic rocks such as schist and gneiss formed under the pressures that involved collisions with landmasses including Avalonia and Laurentia. Glacial sculpting in the Pleistocene shaped northern features in regions like New England Province and Québec, while long-term erosion reduced peaks to the present elevations typified by summits such as Mount Mitchell and Mount Washington. Sedimentary basins in the Appalachian Plateau host stratigraphy correlated with formations studied at sites like Drumheller and regions referenced by the Geological Society of America.

Ecology and Biodiversity

Appalachian ecosystems range from boreal forests in Maine and Québec to temperate broadleaf and mixed forests in the Great Smoky Mountains National Park and Shenandoah National Park. Characteristic flora includes species such as the American chestnut (prior to Chestnut blight), eastern hemlock, and diverse understory plants studied by institutions like the Smithsonian Institution and University of Tennessee. Fauna includes populations of black bear, white-tailed deer, elk, salamanders in the family Plethodontidae, and endemic species observed in locales such as the Spruce Knob–Seneca Rocks National Recreation Area. Threats to biodiversity have been documented by agencies including the U.S. Fish and Wildlife Service and the Canadian Wildlife Service because of factors such as invasive pathogens, acid deposition traced to emissions regulated by statutes like the Clean Air Act, and habitat fragmentation near corridors like Interstate 81.

Human History and Cultural Significance

Indigenous nations such as the Cherokee, the Iroquois Confederacy, the Micmac, and the Wabanaki Confederacy inhabited and used Appalachian landscapes for millennia, engaging in trade networks linked to places like Keystone and the Ohio Country. European colonization brought settlers from England, Scotland, and Ireland, leading to cultural forms including Appalachian music traditions preserved by collectors associated with the Library of Congress and festivals at locations such as Floyd County. The region figured in events including the French and Indian War and later migrations along the Wilderness Road and the Great Wagon Road into the frontier west of the Alleghenies. Literary and scholarly attention has been focused on figures and works like Harriette Arnow, James Still, and ethnographies produced by the Vanderbilt University and West Virginia University.

Economy and Natural Resources

Natural resources of the Appalachians include coal in the Appalachian Basin, natural gas in formations such as the Marcellus Formation, timber harvested in states like West Virginia and Pennsylvania, and minerals including iron ore exploited historically near Pittsburgh. Coal mining fueled industrial centers like Pittsburgh and powered railroads such as the Baltimore and Ohio Railroad; contemporary energy extraction involves companies formerly overseen by agencies such as the Mine Safety and Health Administration and infrastructure projects like the Transcontinental Pipeline. Agriculture and artisanal economies persist in valleys producing commodities sold via markets in Knoxville and Charlotte. Economic challenges and transitions have prompted regional initiatives exemplified by programs from the Appalachian Regional Commission and academic research at institutions like Ohio University and Appalachian State University.

Conservation and Recreation

Conservation efforts span protected areas such as Great Smoky Mountains National Park, Shenandoah National Park, Blue Ridge Parkway, and the Appalachian Trail, managed in partnership with organizations including the National Park Service and the Appalachian Trail Conservancy. Recreational activities include hiking, birdwatching, fishing in rivers like the New River, and winter sports centered at resorts in Vermont and North Carolina. Restoration projects addressing acidified streams, reforestation after surface mining, and species recovery efforts have been supported by programs from the Environmental Protection Agency and non-governmental groups such as the Nature Conservancy. Cultural tourism highlights museums and heritage sites like the Museum of Appalachia and festivals in towns such as Gatlinburg and Galax.

Category:Mountain ranges of North America