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Allegheny Mountains
From Wikipedia, the free encyclopedia
| Allegheny Mountains | |
| Range | |
 Spruce Knob
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| Country | United States |
|---|---|
| States | Pennsylvania, Maryland, West Virginia, Virginia |
| Part of | Appalachian Mountains |
| Borders on | Cumberland Mountains |
| Highest point | Spruce Knob |
| - elevation | 4,863 ft (1,482 m) |
| - coordinates | |
| Geology | Sandstone, Quartzite |
| Orogeny | Alleghenian orogeny |
 Map showing the Allegheny Mountains.
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The Allegheny Mountain Range (also spelled Alleghany and Allegany) -- informally, the Alleghenies — is part of the Appalachian Mountain Range of the eastern United States and Canada. It has a northeast-southwest orientation and runs for over 500 miles (800 km) from north-central Pennsylvania, through western Maryland and eastern West Virginia, to southwestern Virginia.
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The name derives from the Allegheny River. The meaning of the word, which comes from the Lenape (Delaware) Indians, is not definitively known, but is usually translated as "fine river". A Lenape legend tells of an ancient tribe called the "Allegewi" who lived on the river and were defeated by the Lenape (Stewart, 1967). Allegheny is the French spelling, such as the Allegheny River, which was once part of New France, and Allegany is the English spelling, as in Allegany County, Maryland, a former British Colony.
The word "Allegheny" was once commonly used to refer to the whole of the Appalachian Mountains. John Norton used it (spelled variously) around 1810 to refer to the mountains in Tennessee and Georgia. John Muir, in his book A Thousand Mile Walk to the Gulf (written in 1867), used the word "Alleghanies" for the southern Appalachians. Other people used the word "Appalachians". There was no general agreement until the late 19th century. In the 1860s, Arnold Henry Guyot published the first systematic geologic study of the whole mountain range. His map labeled the range as the "Alleghanies", but his book was titled On the Appalachian Mountain System. The term "Appalachian" became commonly used for the whole range, first by geologists and eventually, everyone (Stewart, 1967).
The eastern edge of the Allegheny Mountains is marked by the Allegheny Front, which is also the eastern terminus of the Allegheny Plateau of which the mountains are a part. The highest ridges are just west of the Allegheny Front, which has an east-west elevational change of up to 3,000 feet. Absolute elevations of the Alleghenies reach nearly 5,000 feet, with the highest elevations in the southern part of the range. The highest point in the Allegheny Mountains is Spruce Knob (4,863 ft/1,482 m), on Spruce Mountain in Pendleton County, West Virginia. Other notable Allegheny highpoints include Thorny Flat (on Cheat Mountain), Bald Knob (on Back Allegheny Mountain), and Mount Porte Crayon, all in West Virginia, Dans Mountain (2,898 ft/883m) in Allegany County, Maryland, Backbone Mountain, the highest point in Maryland (3360 ft), Mount Davis (3,213 ft/979 m), the highest point in Pennsylvania and the second highest Blue Knob (3,146 ft/959 m).
To the west, the Alleghenies grade down into the dissected Appalachian Plateaus -- the Allegheny Plateau to the north and the Cumberland Plateau to the south. The Alleghenies are a portion of the Ridge and Valley Province of the Appalachians. To the east of the Alleghenies lies the Great Appalachian Valley, which itself is flanked on the east by the Blue Ridge Mountains in Virginia and South Mountain in Pennsylvania. The mountains to the south of the Alleghenies -- the Appalachians in westernmost Virginia, eastern Kentucky, and eastern Tennessee -- are the Cumberlands. They also constitute part of the Ridge and Valley Province.
The Alleghenies are drained by a number of gorges, principally the North Branch of the Potomac River and the New River.
Much of the Monongahela (West Virginia), George Washington (West Virginia, Virginia) and Jefferson (Virginia) National Forests lie within the Allegheny Mountains. These mountains also include a number of federally-designated wilderness areas, such as the Dolly Sods Wilderness, Laurel Fork Wilderness, and Cranberry Wilderness in West Virginia.
- The mostly completed Allegheny Trail, a project of the West Virginia Scenic Trails Association since 1975, runs the length of the range within West Virginia. The northern terminus is at the Mason-Dixon Line and the southern is at the West Virginia-Virginia border on Peters Mountain.
The bedrock of the Alleghenies is mostly sandstone and metamorphosed sandstone, quartzite, which is extremely resistant to weathering. Prominent beds of resistant conglomerate can be found in some areas, such as the Dolly Sods. When it weathers, it leaves behind a pure white quartzite gravel. The rock layers of the Alleghenies were formed during the Alleghenian orogeny.
Because of intense freeze-thaw cycles in the higher Alleghenies, there is little native bedrock exposed in most areas. The ground surface usually rests on a massive jumble of sandstone rocks, with air space between them, that are gradually moving down-slope. The crest of the Allegheny Front is an exception, where high bluffs are often exposed, revealing an exceptional view.
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This short section requires expansion. |
The Alleghenies of West Virginia are noted for their forests of red spruce, balsam fir, and mountain ash, trees typically found much farther north.
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This short section requires expansion. |
Mountains constituting the Alleghenies (roughly from northeast to southwest):
- Wopsononock Mountain, Pennsylvania
- Tussey Mountain, Pennsylvania
- Mount Davis, Pennsylvania
- Blue Knob, Pennsylvania
- Pine Knob, Pennsylvania
- Cattle Knob, Pennsylvania
- Round Knob, Pennsylvania
- Ritchey Knob, Pennsylvania
- Schaefer Head, Pennsylvania
- Herman Point, Pennsylvania
- Laurel Highlands, Pennsylvania
- Laurel Ridge
- Chestnut Ridge
- Wills Mountain, Pennsylvania, Maryland
- Laurel Mountain, Pennsylvania, Maryland
- Negro Mountain, Pennsylvania, Maryland
- Allegheny Mountain, Pennsylvania, Maryland
- Savage Mountain, Pennsylvania, Maryland
- Little Allegheny Mountain, Pennsylvania, Maryland
- Dan's Mountain, Maryland
- Big Savage Mountain, Maryland
- Briery Mountains, West Virginia
- Laurel Mountain, West Virginia
- Rich Mountain, West Virginia
- Mount Porte Crayon, West Virginia
- Canaan Mountain, West Virginia
- Cabin Mountain, West Virginia
- Brown Mountain, West Virginia
- North Fork Mountain, West Virginia
- River Knobs, West Virginia
- Shenandoah Mountain, West Virginia, Virginia
- Elleber Ridge, West Virginia
- Spruce Mountain, West Virginia
- Spruce Knob, West Virginia
- Little Middle Mountain, West Virginia
- Allegheny Mountain, West Virginia, Virginia
- Middle Mountain, West Virginia
- Little Beech Mountain, West Virginia
- Beech Mountain, West Virginia
- Little Mountain, West Virginia
- Shaver's Fork Mountain Complex, West Virginia
- Black Mountain, West Virginia
- Gauley Mountain, West Virginia
- Yew Mountains, West Virginia
- Back Creek Mountain, Virginia
- Peters Mountain, West Virginia, Virginia
- McNeill, G.D. (Douglas), The Last Forest, Tales of the Allegheny Woods, n.p., 1940 (Reprinted with preface by Louise McNeill, Pocahontas Communications Cooperative Corporation, Dunmore, W.Va. and McClain Printing Company, Parsons, W.Va, 1989.)
- Norton, Major John, The Journal of Major John Norton (Toronto: Champlain Society, 1970)
- Rosier, George L., Compiler, Hiking Guide to the Allegheny Trail, Second edition, West Virginia Scenic Trails Association, Kingwood, W.Va., 1990.
- Smith, J. Lawrence, The High Alleghenies: The Drama and Heritage of Three Centuries, Tornado, West Virginia: Allegheny Vistas; Illustrations by Bill Pitzer, 1982.
- Stewart, George R., Names on the Land, Boston: 1967.
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Annapolis (capital) |
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| Topics | |
| Regions |
Allegheny Mountains | Atlantic Coastal Plain | Baltimore‑Washington Metro Area | Blue Ridge | Chesapeake | Cumberland Valley | Delaware Valley | Delmarva Peninsula | Eastern Shore | Piedmont | Ridge and Valley | Southern Maryland | Western Maryland | Western Shore |
| Cities |
Baltimore | Bethesda | Bowie | College Park | Columbia | Cumberland | Ellicott City | Frederick | Gaithersburg | Germantown | Greenbelt | Hagerstown | Laurel | Rockville | Salisbury | Silver Spring | Takoma Park | Towson | Waldorf | Westminster |
| Counties |
Allegany | Anne Arundel | Baltimore City | Baltimore County | Calvert | Caroline | Carroll | Cecil | Charles | Dorchester | Frederick | Garrett | Harford | Howard | Kent | Montgomery | Prince George's | Queen Anne's | St. Mary's | Somerset | Talbot | Washington | Wicomico | Worcester |
