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89-487: This route is used by birds typically because no mountains block most of this path, though birds cross the Appalachian Mountains to join the flyway. Good sources of water, food, and cover exist over its entire length. The warm climates found in the southern portion of the region are home to many northern birds in winter, while in summer the region is home to many bird species from South America . Land located within

178-463: A fragile ecosystem known as the Southern Appalachian spruce–fir forest . Fraser fir rarely occurs below 5,500 ft (1,700 m), and becomes the dominant tree type at 6,200 ft (1,900 m). By contrast, balsam fir is found from near sea level to the tree line in the northern Appalachians, but ranges only as far south as Virginia and West Virginia in the central Appalachians, where it

267-488: A great number of teal and divers as the winter progresses. In the northeastern states the Saint Lawrence River , the coast of Maine , Long island harbors, Barnegat Bay , Great Egg Harbor , Little Egg Harbor , Absecon Bay, Delaware Bay , Chesapeake Bay, Virginia's Eastern Shore and Back Bays saw presidents and captains of great industry spend part of their winters at their wildfowling clubs. In South Carolina there

356-713: A great thickness of sediment accumulated. Eventually, the tectonic forces pulling the two continents apart became so strong that an ocean formed off the eastern coast of the Laurentian margin. This was called the Iapetus Ocean and was the precursor of the modern Atlantic Ocean. The rocks of the Valley and Ridge province formed over millions of years, in the Iapetus. Shells and other hard parts of ancient marine plants and animals accumulated to form limey deposits that later became limestone. This

445-656: A new ocean opened up, the Rheic Ocean , during the Middle to Late Devonian, and subsequently its closure would result in the formation of the Alleghanian orogeny . As the continental plates moved closer together, fragments of oceanic crust, islands, and other continental masses collided with the eastern margin of ancestral North America. By this time, plants had appeared on land, followed by scorpions, insects, and amphibians. The ocean continued to shrink until, about 270 million years ago,

534-504: A number of deciduous rhododendrons (azaleas), and smaller heaths such as teaberry ( Gaultheria procumbens ) and trailing arbutus ( Epigaea repens ). The evergreen great rhododendron ( Rhododendron maximum ) is characteristic of moist stream valleys. These occurrences are in line with the prevailing acidic character of most oak forest soils. In contrast, the much rarer chinquapin oak ( Quercus muehlenbergii ) demands alkaline soils and generally grows where limestone rock

623-444: A number of serious insect and disease outbreaks. Among the most conspicuous is that of the introduced spongy moth ( Lymantria dispar ), which infests primarily oaks, causing severe defoliation and tree mortality. But it also has the benefit of eliminating weak individuals, and thus improving the genetic stock, as well as creating rich habitat of a type through accumulation of dead wood. Because hardwoods sprout so readily, this moth

712-414: A supercontinent called Rodinia . The collision of these continents caused the rocks to be folded and faulted, creating the first mountains in the region. Many of the rocks and minerals that were formed during that event can currently be seen at the surface of the present Appalachian range. Around 480 million years ago, geologic processes began that led to three distinct orogenic eras that created much of

801-539: A variety of oaks ( Quercus spp.), hickories ( Carya spp.) and, in the past, by the American chestnut ( Castanea dentata ). The American chestnut was virtually eliminated as a canopy species by the introduced fungal chestnut blight ( Cryphonectaria parasitica ), but lives on as sapling-sized sprouts that originate from roots, which are not killed by the fungus. In present-day forest canopies, chestnut has been largely replaced by oaks. The oak forests of

890-610: A variety of other destructive activities continue, albeit in diminished forms; and thus far only a few ecologically based management practices have taken hold. Appalachian bogs are boreal ecosystems , which occur in many places in the Appalachians, particularly the Allegheny and Blue Ridge subranges. Though popularly called bogs , many of them are technically fens . Mount Mitchell Mount Mitchell ( Attakulla in Cherokee )

979-651: Is 6,684 feet (2,037 m) above sea level. Mount Mitchell is ranked 31st by topographic isolation . The peak is the highest mountain in the United States east of the Mississippi River , and the highest in all of eastern North America south of the Arctic Cordillera . The nearest higher peaks are in the Black Hills of South Dakota and the highland foothills of Colorado . The mountain's topographic isolation

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1068-483: Is a boreal species that forms a few high elevation outliers as far south as West Virginia. All of these species except white pine tend to occupy sandy, rocky, poor soil sites, which are mostly acidic in character. White pine, a large species valued for its timber, tends to do best in rich, moist soil, either acidic or alkaline in character. Pitch pine is also at home in acidic, boggy soil, and Table Mountain pine may occasionally be found in this habitat as well. Shortleaf pine

1157-650: Is an extension of this hiking trail into the Canadian portion of the Appalachian range in New Brunswick and Quebec . While exploring inland along the northern coast of Florida in 1528, the members of the Narváez expedition , including Álvar Núñez Cabeza de Vaca , found a Native American village near present-day Tallahassee, Florida whose name they transcribed as Apalchen or Apalachen [a.paˈla.tʃɛn] . The name

1246-537: Is calculated from the nearest discernible single higher point: Lone Butte , which is 1,189 miles (1,913 km) away in southeastern Colorado. Mount Mitchell was the highest mountain of the United States from 1789 until the Louisiana Purchase in 1803 when Mount Elbert became the highest mountain claimed by the United States. Mount Mitchell was also the most isolated peak in the United States from 1789 until

1335-403: Is found at high elevations in the northern Appalachians, and in bogs as far south as Pennsylvania. The Appalachians are also home to two species of fir, the boreal balsam fir ( Abies balsamea ), and the southern high elevation endemic, Fraser fir ( Abies fraseri ). Fraser fir is endemic to the highest parts of the southern Appalachian Mountains, where along with red spruce it forms

1424-533: Is generally found in warmer habitats and at lower elevations than the other species. All the species listed do best in open or lightly shaded habitats, although white pine also thrives in shady coves, valleys, and on floodplains. The Appalachians are characterized by a wealth of large, beautiful deciduous broadleaf (hardwood) trees. Their occurrences are best summarized and described in E. Lucy Braun 's 1950 classic, Deciduous Forests of Eastern North America (Macmillan, New York). The most diverse and richest forests are

1513-414: Is near the surface. Hence no ericaceous shrubs are associated with it. The Appalachian flora also include a diverse assemblage of bryophytes (mosses and liverworts), as well as fungi . Some species are rare and/or endemic. As with vascular plants , these tend to be closely related to the character of the soils and the thermal environment in which they are found. Eastern deciduous forests are subject to

1602-465: Is not as harmful as the hemlock woolly adelgid . Perhaps more serious is the introduced beech bark disease complex, which includes both a scale insect ( Cryptococcus fagisuga ) and fungal components. During the 19th and early 20th centuries, the Appalachian forests were subject to severe and destructive logging and land clearing, which resulted in the designation of the national forests and parks as well many state-protected areas. However, these and

1691-517: Is now the southern United States, the Ococee Basin was formed. Seawater filled the basin. Rivers from the surrounding countryside carried clay, silt, sand, and gravel to the basin, much as rivers today carry sediment from the midcontinent region to the Gulf of Mexico. The sediment spread out in layers on the basin floor. The basin continued to subside, and over a long period of time, probably millions of years,

1780-650: Is older than the other major mountain range in North America, the Rocky Mountains of the west. Some of the outcrops in the Appalachians contain rocks formed during the Precambrian era. The geologic processes that led to the formation of the Appalachian Mountains started 1.1 billion years ago. The first mountain range in the region was created when the continents of Laurentia and Amazonia collided, creating

1869-535: Is possible that the cratons of Kalahari , and Rio Plato , were also part of that early collision since they were present as Rodinia broke up). Mountain-building referred to as the Grenville Orogeny occurred along the boundaries of the cratons. The present Appalachian Mountains have at least two areas which are made from rock formations that were formed during this orogeny - the Blue Ridge Mountains and

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1958-645: Is subject to the hemlock woolly adelgid ( Adelges tsugae ), an introduced insect, that is rapidly extirpating it as a forest tree. Less abundant, and restricted to the southern Appalachians, is Carolina hemlock ( Tsuga caroliniana ). Like Canada hemlock, this tree suffers severely from the hemlock woolly adelgid. Several species of pines characteristic of the Appalachians are eastern white pine ( Pinus strobus ), Virginia pine ( Pinus virginiana ), pitch pine ( Pinus rigida ), Table Mountain pine ( Pinus pungens ) and shortleaf pine ( Pinus echinata ). Red pine ( Pinus resinosa )

2047-605: Is the highest peak of the Appalachian Mountains and the highest peak in mainland North America east of the Mississippi River . It is located near Burnsville in Yancey County , North Carolina in the Black Mountain subrange of the Appalachians about 19 miles (31 km) northeast of Asheville . It is protected by Mount Mitchell State Park and surrounded by the Pisgah National Forest . Mount Mitchell's elevation

2136-506: Is the same process by which limestone forms in modern oceans. The weathering of limestone, now exposed at the land surface, produces the lime-rich soils that are so prevalent in the fertile farmland of the Valley and Ridge province. During this continental break-up, around 600 million to 560 million years ago, volcanic activity was present along the tectonic margins. There is evidence of this activity in today's Blue Ridge Mountains. Mount Rogers , Whitetop Mountain , and Pine Mountain are all

2225-459: Is usually confined above 3,900 ft (1,200 m) asl, except in cold valleys. Curiously, it is associated with oaks in Virginia. The balsam fir of Virginia and West Virginia is thought by some to be a natural hybrid between the more northern variety and Fraser fir. While red spruce is common in both upland and bog habitats, balsam fir, as well as black spruce and tamarack, are more characteristic of

2314-611: The Adirondacks . After the Grenville orogeny, the direction of the continental drift reversed, and the single supercontinent Rodinia began to break up. The mountains formed during the Grenvillian era underwent erosion due to weathering, glaciation, and other natural processes, resulting in the leveling of the landscape. The eroded sediments from these mountains contributed to the formation of sedimentary basins and valleys. For example, in what

2403-525: The Alleghenian orogeny . The soils are well drained, dark brown and stony with fine-earth material ranging in texture from sandy clay loam to loam or sandy loam; Burton and Craggey are the most common series around the summit. The mountain's summit is coated in a dense stand of Southern Appalachian spruce-fir forest , which consists primarily of two evergreen species—the red spruce and the Fraser fir . Most of

2492-581: The Coal Region of northeastern Pennsylvania . The bituminous coal fields of western Pennsylvania , western Maryland , southeastern Ohio, eastern Kentucky, southwestern Virginia , and West Virginia contain the sedimentary form of coal. The mountain top removal method of coal mining , in which entire mountain tops are removed, is currently threatening vast areas and ecosystems of the Appalachian Mountain region. The surface coal mining that started in

2581-496: The Geological Survey of Canada (GSC). The landforms are referred to as physiographic regions. The regions create precise boundaries from which maps can be drawn. The Appalachian Highlands is the name of one of the eight physiographic regions of the contiguous 48 United States. The Appalachian Uplands is the name of one of seven physiographic regions of Canada. The second level in the physiographic classification schema for

2670-694: The Geological Survey of Canada to describe the respective countries' physiographic regions. The U.S. uses the term Appalachian Highlands and Canada uses the term Appalachian Uplands ; the Appalachian Mountains are not synonymous with the Appalachian Plateau , which is one of the provinces of the Appalachian Highlands. The Appalachian range runs from the Island of Newfoundland in Canada, 2,050 mi (3,300 km) southwestward to Central Alabama in

2759-723: The Gulf of Mexico . In the central section, north of the New River, the rivers, rising in or just beyond the Valley Ridges, flow through great gorges to the Great Valley, and then across the Blue Ridge to tidal estuaries penetrating the coastal plain via the Roanoke River, James River , Potomac River , and Susquehanna River . In the northern section the height of land lies on the inland side of

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2848-640: The Iapetus Ocean , from the North America/Europe collision (See Caledonian orogeny ). By the end of the Mesozoic Era , the Appalachian Mountains had been eroded to an almost flat plain. It was not until the region was uplifted during the Cenozoic Era that the distinctive topography of the present formed. Uplift rejuvenated the streams, which rapidly responded by cutting downward into the ancient bedrock. Some streams flowed along weak layers that define

2937-484: The North American craton . Volcanoes grew along the continental margin coincident with the initiation of subduction . Thrust faulting uplifted and warped older sedimentary rock laid down on the passive margin. As the mountains rose, erosion began to wear them down over time. Streams carried rock debris downslope to be deposited in nearby lowlands. The Taconic orogeny ended after about 60 million years, but built much of

3026-608: The Treaty of Guadalupe Hidalgo in 1848 when Mount Whitney became the most isolated. The Cherokee people , who long occupied this area as part of their homeland, called the mountain Attakulla. European-American settlers first called the mountain Black Dome for its rounded shape. They later named it after Elisha Mitchell , a professor at the University of North Carolina , who first explored

3115-650: The eastern seaboard of the United States and the Midwest region of the country. The Eastern Continental Divide follows the Appalachian Mountains from Pennsylvania to Georgia. The Appalachians, particularly the Central and Southern regions, is one of the most biodiverse places in North America. The north–south orientation of the long ridges and valleys contributes to the high number of plant and animal species. Species were able to migrate through these from either direction during alternating periods of warming and cooling, settling in

3204-1546: The mixed-mesophytic or medium-moisture types, which are largely confined to rich, moist montane soils of the southern and central Appalachians, particularly in the Cumberland and Allegheny Mountains, but also thrive in the southern Appalachian coves. Characteristic canopy species are white basswood ( Tilia heterophylla ), yellow buckeye ( Aesculus octandra ), sugar maple ( Acer saccharum ), American beech ( Fagus grandifolia ), tuliptree ( Liriodendron tulipifera ), white ash ( Fraxinus americana ) and yellow birch ( Betula alleganiensis ). Other common trees are red maple ( Acer rubrum ), shagbark and bitternut hickories ( Carya ovata and C. cordiformis ) and black or sweet birch ( Betula lenta ). Small understory trees and shrubs include paw paw ( Asimina tribola ), flowering dogwood ( Cornus florida ), hophornbeam ( Ostrya virginiana ), witch-hazel ( Hamamelis virginiana ) and spicebush ( Lindera benzoin ). There are also hundreds of perennial and annual herbs, among them such herbal and medicinal plants as American ginseng ( Panax quinquefolius ), goldenseal ( Hydrastis canadensis ), bloodroot ( Sanguinaria canadensis ) and black cohosh ( Cimicifuga racemosa ). The foregoing trees, shrubs, and herbs are also more widely distributed in less rich mesic forests that generally occupy coves, stream valleys and flood plains throughout

3293-545: The southeastern U.S. The monthly daily average temperature ranges from 25.1 °F (−3.8 °C) in January to 59.6 °F (15.3 °C) in July. The coldest temperature ever recorded in the state occurred there on January 21, 1985, when it fell to −34 °F (−36.7 °C), during a severe cold spell . It is also the coldest average reporting station in the state at 42.9 °F (6.1 °C), well below any other station. Unlike

3382-581: The 1940s has significantly impacted the central Appalachian Mountains in Kentucky , Tennessee , Virginia and West Virginia. Early mining methods were unregulated and mined land reclamation research, including acid base reaction , was led by the West Virginia University in the 1960s and 1970s. West Virginia developed rigorous mine reclamation standards for state coal mines in the late 1960s. Regulations were introduced by most federal states to protect

3471-546: The Appalachian Basin. Some plateaus of the Appalachian Mountains contain metallic minerals such as iron and zinc . There are many geological issues concerning the rivers and streams of the Appalachians. In spite of the existence of the Great Appalachian Valley, many of the main rivers are transverse to the mountain system axis. The drainage divide of the Appalachians follows a tortuous course that crosses

3560-610: The Appalachian Mountains by the late 1960s. Social and political activism brought about the Surface Mining Control and Reclamation Act of 1977 . The 1859 discovery of commercial quantities of petroleum in the Appalachian Mountains of western Pennsylvania started the modern United States petroleum industry . Recent discoveries of commercial natural gas deposits in the Marcellus Shale formation and Utica Shale formations have once again focused oil industry attention on

3649-526: The Atlantic Flyway is the most densely populated land out of the four major flyways crossing the United States. Ducks and geese are born in the tundra of Quebec , and fly south in autumn to Chesapeake Bay and Virginia 's famous Back Bay , and the James River , and then move southward through North and South Carolina , Georgia and Florida for the winter . Northeast and northwest Florida get

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3738-502: The Atlantic Flyway, there are many key sites that migratory birds use to gather to breed, feed, or rest for certain periods. Some species may remain in these rest stops for the entire season. Notable locations include: The other primary migration routes for North American birds include the Mississippi , Central and Pacific Flyways . There is an East Atlantic Flyway in Europe, and one in

3827-584: The Atlantic Ocean. Appalachian Mountains The Appalachian Mountains , often called the Appalachians , are a mountain range in eastern to northeastern North America . The term "Appalachian" refers to several different regions associated with the mountain range, and its surrounding terrain. The general definition used is one followed by the United States Geological Survey and

3916-568: The Black Mountain region in 1835. He determined that the height of the range exceeded by several hundred feet that of Mount Washington in New Hampshire . The latter had been commonly thought at the time to be the highest point in the United States east of the Rocky Mountains . Mitchell fell to his death at nearby Mitchell Falls in 1857, where he had returned to verify his earlier measurements. A 4.6-mile (7.4 km) road ( NC 128 ) connects

4005-536: The Blue Ridge again reaches 2,000 ft (600 m) and higher. In the Virginia Blue Ridge, the following are some of the highest peaks north of the Roanoke River : Stony Man 4,031 ft (1,229 m), Hawksbill Mountain 4,066 ft (1,239 m), Apple Orchard Mountain 4,225 ft (1,288 m) and Peaks of Otter 4,001 and 3,875 ft (1,220 and 1,181 m). South of the Roanoke River, along

4094-708: The Blue Ridge, are Virginia's highest peaks including Whitetop Mountain 5,520 ft (1,680 m) and Mount Rogers 5,729 ft (1,746 m), the highest point in the Commonwealth. Chief summits in the southern section of the Blue Ridge are located along two main crests, the Western or Unaka Front along the Tennessee - North Carolina border and the Eastern Front in North Carolina, or one of several "cross ridges" between

4183-883: The Great Balsams. The Western Blue Ridge Front is subdivided into the Unaka Range , the Bald Mountains , the Great Smoky Mountains , and the Unicoi Mountains , and its major peaks include Roan Mountain 6,285 ft (1,916 m) in the Unakas, Big Bald 5,516 ft (1,681 m) and Max Patch 4,616 ft (1,407 m) in the Bald Mountains, Kuwohi 6,643 ft (2,025 m), Mount Le Conte 6,593 feet (2,010 m), and Mount Guyot 6,621 ft (2,018 m) in

4272-727: The Great Smokies, and Big Frog Mountain 4,224 ft (1,287 m) near the Tennessee- Georgia -North Carolina border. Prominent summits in the cross ridges include Waterrock Knob (6,292 ft (1,918 m)) in the Plott Balsams . Across northern Georgia, numerous peaks exceed 4,000 ft (1,200 m), including Brasstown Bald , the state's highest, at 4,784-and-4,696 ft (1,458-and-1,431 m) Rabun Bald . In north-central Alabama , Mount Cheaha rises prominently to 1,445 feet (440 m) over its surroundings, as part of

4361-595: The Pinnacle 3,007 feet (917 m) and Pidgeon Roost 3,400 ft (1,000 m). In West Virginia, more than 150 peaks rise above 4,000 ft (1,200 m), including Spruce Knob 4,863 ft (1,482 m), the highest point in the Allegheny Mountains . A number of other points in the state rise above 4,800 ft (1,500 m). Cheat Mountain ( Snowshoe Mountain ) at Thorny Flat 4,848 ft (1,478 m) and Bald Knob 4,842 ft (1,476 m) are among

4450-433: The USGS is "province", the same word as Canada uses to divide its political subdivisions, meaning that the terminology used by the two countries do not match below the region level. The lowest level of classification is "section". The Appalachian Uplands are one of the seven physiographic divisions in Canada . Canada's GSC does not use the same classification system as the USGS below the division level. The agency does break

4539-433: The United States and Canada, and partly because the range was formed over numerous geologic time periods, one of which is sometimes termed the Appalachian orogeny , writing communities struggle to agree on an encyclopedic definition of the mountain range. However, each of the governments has an agency that informs the public about the major landforms that make up the countries, the United States Geological Survey (USGS) and

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4628-429: The United States; south of Newfoundland, it crosses the 96-square-mile (248.6 km ) archipelago of Saint Pierre and Miquelon , an overseas collectivity of France , meaning it is technically in three countries. The highest peak of the mountain range is Mount Mitchell in North Carolina at 6,684 feet (2,037 m), which is also the highest point in the United States east of the Mississippi River . The range

4717-414: The border of the coastal plain through the central and southern Atlantic states; and on the northwest, the Allegheny and Cumberland plateaus declining toward the Great Lakes and the interior plains. A remarkable feature of the belt is the longitudinal chain of broad valleys, including the Great Appalachian Valley , which in the southerly sections divides the mountain system into two unequal portions, but in

4806-457: The continent that are now exposed. The first mountain-building tectonic plate collision that initiated the construction of what are today the Appalachians occurred at least a billion years ago when the pre-North American craton called Laurentia collided with at least one other craton - Amazonia . All the other cratons of the earth also collided at about this time to form the supercontinent Rodinia and were surrounded by one single ocean. (It

4895-416: The continents that were ancestral to North America and Africa collided during the formation of the supercontinent Pangea . Because North America and Africa were once geographically connected, the Appalachians formed part of the same mountain chain as the Little Atlas in Morocco . This mountain range, known as the Central Pangean Mountains , extended into Scotland , before the Mesozoic Era opening of

4984-412: The deciduous needle-leaf conifer, the tamarack , or eastern larch ( Larix laricina ). The dominant northern and high elevation conifer is the red spruce ( Picea rubens ), which grows from near sea level to above 4,000 ft (1,200 m) above sea level (asl) in northern New England and southeastern Canada. It also grows southward along the Appalachian crest to the highest elevations of

5073-399: The divisions of the Appalachian Uplands into 13 subsections that are in four different political provinces of Canada. While the Appalachian Highlands and Appalachian Uplands are generally continuous across the U.S./Canadian border, the St. Lawrence Valley area is handled differently in the physiographic classification schemas. The part of the St. Lawrence Valley in the United States is one of

5162-529: The driest sites are dominated by chestnut oak, or sometimes by scarlet or northern red oaks. In the northern Appalachians the oaks, except for white and northern red, drop out, while the latter extends farthest north. The oak forests generally lack the diverse small tree, shrub and herb layers of mesic forests. Shrubs are generally ericaceous , and include the evergreen mountain laurel ( Kalmia latifolia ), various species of blueberries ( Vaccinium spp.), black huckleberry ( Gaylussacia baccata ),

5251-440: The early 19th century, Washington Irving proposed renaming the United States either Appalachia or Alleghania. In U.S. dialects in the southern regions of the Appalachians, the word is pronounced / ˌ æ p ə ˈ l æ tʃ ɪ n z / , with the third syllable sounding like "latch". In northern parts of the mountain range, it is pronounced / ˌ æ p ə ˈ l eɪ tʃ ɪ n z / or / ˌ æ p ə ˈ l eɪ ʃ ɪ n z / ;

5340-425: The folds and faults created many millions of years earlier. Other streams downcut so rapidly that they cut right across the resistant folded rocks of the mountain core, carving canyons across rock layers and geologic structures. The Appalachian Mountains contain major deposits of anthracite coal as well as bituminous coal . In the folded mountains the coal is in metamorphosed form as anthracite , represented by

5429-489: The high-altitude ecosystem is debatable. While the mountain is still mostly lush and green in the summer, many dead Fraser fir trunks can be seen due to these serious problems. Reducing air pollution is a difficult issue, as the pollutants are often carried by air to this area from long distances. Sources can be local or hundreds of miles away, requiring cooperation from as far away as the Midwest . Wildflowers are abundant all summer long. Young fir and spruce trees do well in

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5518-431: The land mass that is now New England and southwestward to Pennsylvania. The Taconic Orogeny was the second of four mountain building plate collisions that contributed to the formation of the Appalachians, culminating in the collision of North America and Africa (see Alleghanian orogeny ). The third mountain-building event was the Acadian orogeny which occurred between 375 and 359 million years ago. The Acadian orogeny

5607-469: The latter. However, balsam fir also does well in soils with a pH as high as 6. Eastern or Canada hemlock ( Tsuga canadensis ) is another important evergreen needle-leaf conifer that grows along the Appalachian chain from north to south but is confined to lower elevations than red spruce and the firs. It generally occupies richer and less acidic soils than the spruce and firs and is characteristic of deep, shaded and moist mountain valleys and coves . It

5696-454: The lower elevations in the surrounding regions, heavy snows often fall from December to March, with 50 inches (1.27 m) accumulating in the Great Blizzard of 1993 and 33 inches (0.84 m) in the January 2016 blizzard . Due to the high elevation, precipitation is heavy and reliable year-round, averaging 81.09 inches (2,060 mm) for the year, with no month receiving less than 5 in (127 mm) of average precipitation. The summit

5785-450: The mature Fraser firs, however, were killed off by the non-native Balsam woolly adelgid in the latter half of the 20th century. The high elevations expose plant life to high levels of pollution, including acid precipitation in the form of rain, snow, and fog. These acids damage the red spruce trees in part by releasing natural metals from the soil, such as aluminum , and by leaching important minerals . To what extent this pollution harms

5874-456: The microclimates that best suited them. The flora of the Appalachians are diverse and vary primarily in response to geology, latitude, elevation and moisture availability. Geobotanically, they constitute a floristic province of the North American Atlantic Region . The Appalachians consist primarily of deciduous broad-leaf trees and evergreen needle-leaf conifers, but also contain the evergreen broad-leaf American holly ( Ilex opaca ), and

5963-433: The more notable peaks in West Virginia. The Blue Ridge Mountains , rising in southern Pennsylvania and there known as South Mountain , attain elevations of about 2,000 ft (600 m) in Pennsylvania. South Mountain achieves its highest point just below the Mason-Dixon line in Maryland at Quirauk Mountain 2,145 ft (654 m) and then diminishes in height southward to the Potomac River . Once in Virginia ,

6052-406: The mountainous belt just north of the New River in Virginia. South of the New River, rivers head into the Blue Ridge, cross the higher Unakas, receive important tributaries from the Great Valley, and traversing the Cumberland Plateau in spreading gorges ( water gaps ), escape by way of the Cumberland River and the Tennessee River rivers to the Ohio River and the Mississippi River, and thence to

6141-429: The mountainous belt, and thus the main lines of drainage run from north to south, exemplified by the Hudson River . However, the valley through which the Hudson River flows was cut by the gigantic glaciers of the ice ages —the same glaciers that deposited their terminal moraines in southern New York and formed the east–west Long Island . The Appalachian region is generally considered the geographical divide between

6230-432: The name of the tribe to the mountains themselves. The first cartographic appearance of Apalchen is on Diego Gutiérrez 's map of 1562; the first use for the mountain range is the map of Jacques le Moyne de Morgues in 1565. The name was not commonly used for the whole mountain range until the late 19th century. A competing and often more popular name was the "Allegheny Mountains", "Alleghenies", and even "Alleghania". In

6319-408: The northernmost lies west of all the ranges possessing typical Appalachian features, and separates them from the Adirondack group. The mountain system has no axis of dominating altitudes, but in every portion, the summits rise to rather uniform heights, and, especially in the central section, the various ridges and intermontane valleys have the same trend as the system itself. None of the summits reaches

6408-424: The oceans, but there were no plants or animals on land. Then, during the middle Ordovician Period about 500 to 470 million years ago, the motion of the crustal plates changed, and the continents began to move back toward each other. The once-quiet Appalachian passive margin changed to a very active plate boundary when a neighboring Iapetus oceanic plate containing a volcanic arc collided with and began sinking beneath

6497-455: The region of perpetual snow. In Pennsylvania , there are over sixty summits that rise over 2,500 ft (800 m); the summits of Mount Davis and Blue Knob rise over 3,000 ft (900 m). In Maryland, Eagle Rock and Dans Mountain are conspicuous points reaching 3,162 and 2,882 ft (964 and 878 m) respectively. On the same side of the Great Valley, south of the Potomac, are

6586-482: The result of volcanic activity that occurred around this time. Evidence of subsurface activity, dikes and sills intruding into the overlying rock, is present in the Blue Ridge as well. For instance, mafic rocks have been found along the Fries Fault in the central Blue Ridge area of Montgomery County, VA. The Iapetus continued to expand and during that time bacteria, algae, and many species of invertebrates flourished in

6675-519: The ridges are not high, the terrain is extremely rugged. In Ohio and New York, some of the plateau has been glaciated , which has rounded off the sharp ridges and filled the valleys to some extent. The glaciated regions are usually referred to as hill country rather than mountains. The Appalachian belt includes the plateaus sloping southward to the Atlantic Ocean in New England , and southeastward to

6764-544: The scenic Blue Ridge Parkway to a parking lot where a steep paved 980-foot (300 m) trail leads through a conifer forest to the summit. The 40-foot (12 m) stone observation tower on the summit was torn down in late 2006. A new observation deck was constructed and opened to visitors in January 2009. Mount Mitchell was formed during the Precambrian when marine deposits were metamorphosed into gneiss and schist . These metasedimentary rocks were later uplifted during

6853-495: The second-level classifications, part of the Appalachian Highlands. In Canada, the area is part of the first-level classification, the St. Lawrence Lowlands . This includes the area around the city of Montreal, Anticosti Island , and the northwest coastline of Newfoundland. The dissected plateau area, while not actually made up of geological mountains, is popularly called "mountains", especially in eastern Kentucky and West Virginia, and while

6942-472: The southern Appalachians, as in North Carolina and Tennessee . In the central Appalachians it is usually confined above 3,000 ft (900 m) asl, except for a few cold valleys in which it reaches lower elevations. In the southern Appalachians, it is restricted to higher elevations. Another species is the black spruce ( Picea mariana ), which extends farthest north of any conifer in North America,

7031-413: The southern and central Appalachians consist largely of black , northern red , white , chestnut and scarlet oaks ( Quercus velutina, Q. rubra, Q. alba, Q. prinus and Q. coccinea ) and hickories, such as the pignut ( Carya glabra ) in particular. The richest forests, which grade into mesic types, usually in coves and on gentle slopes, have predominantly white and northern red oaks, while

7120-511: The southern and central Appalachians at low and intermediate elevations. In the northern Appalachians and at higher elevations of the central and southern Appalachians these diverse mesic forests give way to less diverse northern hardwood forests with canopies dominated only by American beech, sugar maple, American basswood ( Tilia americana ) and yellow birch and with far fewer species of shrubs and herbs. Drier and rockier uplands and ridges are occupied by oak–chestnut forests dominated by

7209-535: The southernmost spur of the Blue Ridge Mountains. Sources written prior to the recognition of the concept of physiographic regions divided the Appalachian Mountains into three major sections: Plate tectonics over the period dating back at least 1 billion years led to geological creation of the land that is now the Appalachian Mountain range. The continental movement led to collisions that built mountains and they later pulled apart creating oceans over parts of

7298-462: The subalpine climate, and their cones feed the birds along with wild blueberry and blackberry shrubs. The second highest point in eastern North America, Mount Craig at 6,647 feet (2,026 m), is roughly a mile to the north of Mount Mitchell. The summit area of Mount Mitchell is marked by a warm-summer humid continental climate ( Köppen Dfb ), with mild summers and long, moderately cold winters, being more similar to southeastern Canada than

7387-564: The surface structure seen in today's Appalachians. During this period, mountains once reached elevations similar to those of the Alps and the Rockies before natural erosion occurred over the last 240 million years leading to what is present today. The Appalachian Mountains are a barrier to east–west travel, as they form a series of alternating ridgelines and valleys oriented in opposition to most highways and railroads running east–west. This barrier

7476-440: The third syllable is like "lay", and the fourth "chins" or "shins". There is often great debate between the residents of the regions regarding the correct pronunciation. Elsewhere, a commonly accepted pronunciation for the adjective Appalachian is / ˌ æ p ə ˈ l æ tʃ i ə n / , with the last two syllables "-ian" pronounced as in the word "Romanian". Perhaps partly because the range runs through large portions of both

7565-607: The two main crests. Major subranges of the Eastern Front include the Black Mountains , Great Craggy Mountains , and Great Balsam Mountains , and its chief summits include Grandfather Mountain 5,964 ft (1,818 m) near the Tennessee-North Carolina border, Mount Mitchell 6,684 ft (2,037 m) in the Blacks, and Black Balsam Knob 6,214 ft (1,894 m) and Cold Mountain 6,030 ft (1,840 m) in

7654-650: Was Georgetown's and Charleston's old rice fields , and backcountry marshes and freshwater rivers and lakes that continued to draw ducks in great numbers until the Santee National Wildlife Refuge stopped feeding the ducks in the winter months of the 1980s due to the economy and changes in National Wildlife Refuge policy across the nation. In the 1960s to the mid-1980s the upper Santee swamp's upper Lake Marion region used to winter over 150,000 mallards each and every winter's duck count. Along

7743-639: Was caused by a series of collisions of pieces of crust from the Avalonia Terrane, sections broken off from continent of Gondwana , with the North American Plate. The collision initiating this orogeny resulted in the closing of the southern Iapetus Ocean and the formation of a high mountain belt. After the Acadian collision took place, Gondwana began to retreat from Laurentia with the newly accreted Avalonian terranes left behind. As Gondwana moved away,

7832-574: Was extremely important in shaping the expansion of the United States in the colonial era. The range is the home of a very popular recreational feature, the Appalachian Trail . This is a 2,175-mile (3,500 km) hiking trail that runs all the way from Mount Katahdin in Maine to Springer Mountain in Georgia , passing over or past a large part of the Appalachian range. The International Appalachian Trail

7921-510: Was soon altered by the Spanish to Apalachee and used as a name for the tribe and region spreading well inland to the north. Pánfilo de Narváez 's expedition first entered Apalachee territory on June 15, 1528, and applied the name. Now spelled "Appalachian", it is the fourth-oldest surviving European place-name in the US. After the 1540 expedition of Hernando de Soto , Spanish cartographers began to apply

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