→ Main article: Geography of North Carolina
Location and extent
North Carolina is located on the southeast coast of the United States and borders the states of South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. The Atlantic Ocean lies to the east. The northern border of the state runs along the latitude from 36°35′10″ on the west to 36°32′27″ on the east. The western border runs along the crest of the Appalachian Mountains. The southernmost point of the state is at 33°50′57″ north latitude; its north-south extent measures 300.3 kilometers, and its west-east extent between 75°27′15″ and 84°19′01″ west longitude is 807.4 kilometers. The state covers an area of 139,389 square kilometres, of which 125,919 square kilometres is land area, making it slightly larger than Greece.
Regions
Geographically and geologically, North Carolina can be divided from east to west into three major parts: the coastal plain on the Atlantic Ocean, the Piedmont Plateau in the hinterland, and the Appalachian mountain region.
About two-thirds of the state is occupied by the Atlantic coastal plain. The soils of the very flat plain are sandy and are covered with dense forests consisting mainly of pines and other evergreen trees. The soils are particularly suitable for the cultivation of tobacco, soya, melons and cotton. This region, which includes the Inner Banks, is the most rural of North Carolina, with only a few major cities and towns. Offshore from the land are the Outer Banks, a chain of narrow and variable dune islands that form a barrier between the Atlantic Ocean and inland waterways. The Outer Banks enclose the two largest lagoons in the United States, Albemarle Sound to the north and Pamlico Sound to the south, whose area exceeds that of the state of Connecticut. North Carolina's coast lacks a suitable natural harbor, so it never developed a major seaport such as Charleston in South Carolina or Savannah in Georgia. The state's only major port, Wilmington, is located about 25 kilometers inland on the Cape Fear River. The Coastal Plain is the largest and also the youngest geological section of the state. It consists mainly of sedimentary rocks, mostly sand and clay, with limestone also found in the southern part of the coastal plain. The state's most economically important mineral, phosphate usable for fertilizer, is mined in this region. The Coastal Plain is bounded by the three-million-year-old coastline 90 meters above present-day sea level, also known as the fall zone, where the Piedmont Plateau drops relatively steeply to the coastal region, and where the state's Appalachian rivers have rapids and waterfalls.
The Piedmont region in the center of the state is the most urbanized and densely populated region of North Carolina. The Piedmont is a rolling landscape, frequently interrupted by smaller foothills and river-carved valleys, formed from almost completely eroded remnants of higher mountains. The geologic structures are dominated by the Inner Piedmont Belt with ages ranging from 750 to 500 million years of the Kings Mountain Belt, Milton Belt, Charlotte Belt, Carolina Slate Belt, Raleigh Belt, and the Eastern Slate Belt, all of which range in age from 650 to 300 million years. Also part of the Piedmont are the much younger Triassic Basins, 200 to 190 million years old, former subsidence trenches that were filled by mud and scoured sediments from adjacent higher elevations. In the Carolina Slate Belt, the first gold discovery in the United States was documented in 1799, and mines were operated to extract gold in the early 19th century; today, in addition to lithium and clay, granite, gneiss, and other materials for construction are primarily mined in this region. The elevation of the Piedmont ranges from about 90 meters in the east to 300 meters above sea level in the west. The soils consist mainly of thin stony layers on a clay base; only on the eastern edge of the plateau are sandy hills marking a former coastline with its dunes and beaches. Peaches and melons, for which the region is known, are the main crops grown on the well-moistened soils. Due to the rapid urbanization of the landscape since the 1970s, agriculture has been and continues to be largely displaced, giving way to a suburban structure.
The Appalachian mountain range forms the western border of the state. The mountains in North Carolina's territory can be divided into four ranges. The Blue Ridge Mountains are the largest range and run in a winding line through the western part of the state with occasional high spurs over the surrounding terrain; Mount Mitchell, at 2037 m, is the highest elevation in the state and also the highest point in the United States east of the Rocky Mountains. The Great Smoky Mountains, also known as the Smokies, form the western border of the state and are the second highest mountain range in North Carolina. The oldest rock, at about one and a half billion years old, is found in the western part of the state. The belt known as the Blue Ridge Belt, which also includes the smaller Murphy Belt and Grandfather Mountain Window sections, consists of igneous, sedimentary, and metamorphic rocks containing feldspar, mica, and quartz. The Brushy Mountains are much smaller and lower, their highest peak being Pores Knob. It is 817 metres above sea level. The Uwharrie Mountains are the easternmost and oldest and lowest mountain range in North Carolina. The highest elevation of this range is High Rock Mountain at less than 350 meters above sea level. Between the mountains are fertile valleys interspersed with numerous rivers and streams. The mountains themselves are covered with lush forests, with only a few peaks bare with prairie-like vegetation. Although agriculture still plays an important role in this region, the importance of tourism is steadily increasing and has become the most important economic sector of the mountain region.
Waters
North Carolina's river systems can be divided into two main groups. The main eastern watershed of North America runs along the crest of the Appalachian Mountains. Only the rivers in the extreme west of the state drain to the Gulf of Mexico by way of the Mississippi; the rivers which rise on the eastern flank of the mountains empty into the Atlantic. The latter are further subdivided as to their mouths, which are either in the territory of North or South Carolina. The division between the river systems that flow into the Atlantic is caused by an elevation that runs southeast from the foothills of the Blue Ridge Mountains almost to the port city of Wilmington along the Virginia border.
The Catawba River and the Yadkin River, with their tributaries, flow through about 30 counties in the state. They fan out across the country, draining much of the Piedmont before flowing across the border into South Carolina and reaching the coast. Chowan, Roanoke, Tar, Neuse, and Cape Fear Rivers empty into North Carolina and were important trade routes before railroad routes were built. Only one of the rivers flows directly into the sea; the others fan out farther and farther in the coastal plain and empty into the sounds. These lagoons and the rivers that flow into them create a network of waterways some 1800 kilometres long, suitable for steam and sail navigation.
The banks of the rivers are lined with riparian forests of poplars, willows and alders in the upper reaches, and with forests of bald cypress in the shallow lower reaches. In their course from the high plateaus to the lowlands, they overcome differences in altitude of several hundred metres through rapids and waterfalls. In the colonial past, cotton mills and other businesses such as sawmills often took advantage of this gradient, encouraging the rise of many cities and towns. The sounds and shallower rivers of the low-lying coastal plain provide rich fish stocks and colonies of waterfowl.
Smaller natural lakes are found throughout North Carolina; however, damming of rivers by power companies has also created larger reservoirs and dams that serve as tourist destinations, recreational areas, and hunting and fishing regions in addition to flood control and power generation. One major lake area, for example, was created by the backwater of the Yadkin River at the foothills of the Uwharrie Mountains: the Uwharrie Lakes. The largest of these lakes is High Rock Lake. The largest man-made lake in North Carolina, covering 129 square miles, is Lake Norman, a reservoir on the Catawba River, on whose shores Lake Norman State Park was created.
Climate
Warm temperate rainy climates prevail throughout most of the state, with the exception of the higher elevations in the Appalachian Mountains, which are considered part of the fully humid boreal climate zone. The mountains often serve as a "shield" for the Piedmont region, keeping out low temperatures and storms from the Midwest. The average daytime temperature in most areas of the state is around 32 °C in July. In January, temperatures average around 10 °C.
The coastal plain is climatically influenced by the Atlantic Ocean, which provides mild weather in winter and moderately warm weather in summer. The daily maximum temperature on the coast is 31 °C in summer, while temperatures rarely fall below 4 °C in winter. The average daily maximum temperature in the winter months is around 15 °C in the coastal plain, and temperatures below freezing are extremely rare. The Coastal Plain receives about two inches of snow annually, and many winters are completely free of snow and ice. In the Piedmont, however, summers are warmer and winters are colder than in the Coastal Plain. Daytime high temperatures average over 32 °C in summer, but rarely rise above 37 °C. In winter, daytime temperatures average around 10 °C and often drop below freezing at night. Annual snowfall ranges from 7 to 20 centimeters. Winter weather in the Piedmont is known for sleet showers and freezing rain, which in some storms can be so heavy that trees and power lines collapse under the load. Annual rainfall and humidity in the Piedmont are lower than on the coast or in the mountains, with about 1000 liters per square meter of precipitation recorded annually. The coolest area of North Carolina is the Appalachian Mountains; there the temperature rarely rises above 26 °C in summer. Average daily temperatures in winter range from -1 °C to 5 °C, often dropping below -9 °C. Snowfall ranges from 36 to 51 centimeters per year, usually more in the higher elevations.
Because of its exposed location on the Atlantic coast in the far southeast, North Carolina is hit with great force by a hurricane on average once every decade, with additional tropical storms hitting the state about every three to four years. In some years, North Carolina may be hit several times by a hurricane and additional tropical storms, or feel the effects of the foothills of these storms in the coastal plain. Only the states of Florida, Texas, and Louisiana are hit by hurricanes more frequently than North Carolina. On average, thunderstorms are recorded 50 days per year, some severe enough to produce hail and hurricane-force wind gusts. Although most hurricanes cause damage in the coastal regions of the state, they can certainly reach inland and cause major destruction. On an annual average, North Carolina experiences fewer than 20 tornadoes, most of which are caused by hurricanes or tropical storms in the coastal plain. Tornadoes resulting from thunderstorms occur in the eastern parts of the state, while the western Piedmont is often protected from such storms by the mountains. Another weather phenomenon called cold air damming, the buildup of cold air masses, occasionally occurs in the western part of the state. This can weaken storms, but also leads to heavy freezing rain in the winter.
fauna and flora
The fauna and flora of the state present a very varied picture, ranging from the sparse and shallow-rooted growth of the coastal region and the American alligators that inhabit it, to the coniferous forests in the Appalachians inhabited by bears and white-tailed deer. The typical plants and animals of the Southeast are represented in the lowlands, while the higher elevations are home to more northern-distributed species. A total of about 300 tree species and subspecies, and about 3000 different flowering plants have been counted. Several of the plants and animal species found in North Carolina are considered endangered, partly referring to the occurrence in the state, but also nationally endangered species have their habitat in North Carolina, for example various whale species and the Blue Ridge goldenrod.
In the coastal region, the salt marshes and marshlands are colonized mainly by the mudgrass Spartina patens and the grass Distichlis spicata, and on coastal dunes grows the tall grass Uniola paniculata (sea oats). The main tree species are Virginian cedars and pines, but the region's blackwater swamps also provide good growing conditions for bald cypresses, swamp magnolias and tupelo trees. Worldwide exclusive to the Pocosin marshes around Wilmington, the Venus flytrap is common. In addition to various saltwater and freshwater fish, oysters, sea turtles, and the protected American alligators live in the state's rivers, lakes, and coastline. A unique feature of the Outer Banks are the bank ponies that live semi-feral on the island chain.
In the Piedmont, the trees can root deeper, and the forests are dominated by various species of oak and hickory, and formerly also by American chestnut. Various species of poplar, birch, linden, horse chestnut, and maple grow there, along with, for example, Carolina hemlock and several species of orchids. Common animal species include raccoons, squirrels, opossums, some endangered bat species, and beavers. The rivers and lakes are inhabited by bass, catfish, and other fish, and there are also a variety of different waterfowl, especially species of ducks and geese.
Towards the mountains the vegetation changes into coniferous forests, partly the habitats of the animals overlap with the Piedmont. Gray wolves and mountain lions are already extinct, but bobcats can be found in the forests of North Carolina. The Great Smoky Mountains area is also home to black bears, which are now a tourist attraction. Wild hogs, introduced as recently as the 19th century, are common, as are white-tailed deer. Trout and bass live in the clear rivers of the mountains.