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32-668: Short Hill rises sharply from the Piedmont countryside of the Loudoun Valley , northwest of Purcellville . It is a low-lying ridge, barely over 400 feet (120 m) in elevation. The mountain ridge extends northeast for approximately 3 miles (4.8 km) before descending to the Hillsboro Gap , through which the North Fork of Catoctin Creek flows and the town of Hillsboro is located. North of

64-542: A physiographic province of the larger Appalachian Highlands range. The mountain range is located in the Eastern United States and extends 550 miles southwest from southern Pennsylvania through Maryland , West Virginia , Virginia , North Carolina , South Carolina , Tennessee , and Georgia . The province consists of northern and southern physiographic regions, which divide near the Roanoke River gap. To

96-462: A massive texture and missed the main episode of Mesoproterozoic compression. At the time of their emergence, the Blue Ridge were among the highest mountains in the world and reached heights comparable to the much younger Alps . Weathering , erosion , and mass wasting over hundreds of millions of years has resulted in much shorter peaks. At the foot of the Blue Ridge, various tribes including

128-422: A professor and geologist at George Washington University , provide greater insight into the petrologic and geochronologic history of the Blue Ridge basement suites. Modern studies have found that the basement geology of the Blue Ridge is made of compositionally unique gneisses and granitoids , including orthopyroxene-bearing charnockites. Analysis of zircon minerals in the granite completed by John Aleinikoff at

160-679: Is a plateau region located in the Eastern United States . It is situated between the Atlantic Plain and the Blue Ridge Mountains , stretching from New York in the north to central Alabama in the south. The Piedmont Province is a physiographic province of the larger Appalachian Highlands physiographic division and consists of the Piedmont Upland, and the Piedmont Lowlands sections. The Atlantic Seaboard Fall Line marks

192-526: Is complex, with numerous rock formations of different materials and ages intermingled with one another. Essentially, the Piedmont is the remnant of several ancient mountain chains that have since been eroded. Geologists have identified at least five separate events which have led to sediment deposition, including the Grenville orogeny (the collision of continents that created the supercontinent Rodinia ) and

224-601: Is its southern boundary.) The fall line, where the land rises abruptly from the coastal plain, marks the limit of navigability on many major rivers, so inland ports sprang up along it. Within the Piedmont region itself, there are several areas of urban concentration, the largest being the Atlanta metropolitan area in Georgia. The Piedmont cuts Maryland in half, covering the Baltimore–Washington metropolitan area . In Virginia ,

256-612: The Appalachian orogeny during the formation of Pangaea . The last major event in the history of the Piedmont was the break-up of Pangaea, when North America and Africa began to separate. Large basins formed from the rifting and were filled by the sediments shed from the surrounding higher ground. The series of Mesozoic basins is almost entirely located inside the Piedmont region. Piedmont soils are generally clay -like ( Ultisols ) and moderately fertile. In some areas they have suffered from erosion and over-cropping, particularly in

288-958: The Greater Richmond metropolitan area is the largest urban concentration. In North Carolina, the Piedmont Crescent includes several metropolitan clusters such as Charlotte metropolitan area , the Piedmont Triad , and the Research Triangle . Other notable areas include the Greenville-Spartanburg-Anderson, SC Combined Statistical Area in South Carolina, and the Philadelphia metropolitan area in Pennsylvania. Blue Ridge Mountains The Blue Ridge Mountains are

320-518: The Italian : Piemonte , meaning " foothill ", ultimately from Latin "pedemontium", meaning "at the foot of the mountains", similar to the name of the Italian region of Piedmont ( Piemonte ), abutting the Alps . The surface relief of the Piedmont is characterized by relatively low, rolling hills with heights above sea level between 200 feet (50 m) and 800 feet to 1,000 feet (250 m to 300 m). Its geology

352-478: The New York–New Jersey Highlands . The petrologic and geochronologic data suggest that the Blue Ridge basement is a composite orogenic crust that was emplaced during several episodes from a crustal magma source. Field relationships further illustrate that rocks emplaced prior to 1.078–1.064 billion years ago preserve deformational features. Those emplaced post-1.064 billion years ago generally have

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384-729: The Siouan Manahoacs , the Iroquois , and the Shawnee hunted and fished. A German physician-explorer, John Lederer , first reached the crest of the Blue Ridge in 1669 and again the following year; he also recorded the Virginia Siouan name for the Blue Ridge ( Ahkonshuck ). At the Treaty of Albany negotiated by Virginia Lieutenant Governor Alexander Spotswood with the Iroquois between 1718 and 1722,

416-499: The U.S. Geological Survey has provided more detailed emplacement ages. Many of the features found in the Blue Ridge and documented by Tollo and others have confirmed that the rocks exhibit many similar features in other North American Grenville-age terranes . The lack of a calc-alkaline affinity and zircon ages less than 1.2 billion years old suggest that the Blue Ridge is distinct from the Adirondacks , Green Mountains, and possibly

448-691: The Blue Ridge: the Brushy Mountains and the South Mountains . In Virginia the Southwest Mountains are an anticlinal range that similarly parallels the Blue Ridge. The Blue Ridge extends as far south as Mount Oglethorpe in Georgia and as far north into Pennsylvania as South Mountain . While South Mountain dwindles to hills between Gettysburg and Harrisburg , the band of ancient rocks that form

480-684: The Iroquois ceded lands they had conquered south of the Potomac River and east of the Blue Ridge to the Virginia Colony . This treaty made the Blue Ridge the new demarcation point between the areas and tribes subject to the Six Nations, and those tributaries to the colony. When colonists began to disregard this by crossing the Blue Ridge and settling in the Shenandoah Valley in the 1730s, the Iroquois began to object, finally selling their rights to

512-646: The Piedmont's eastern boundary with the Coastal Plain. To the west, it is mostly bounded by the Blue Ridge Mountains , the easternmost range of the Appalachians. The width of the Piedmont varies, being quite narrow above the Delaware River but nearly 300 miles (475 km) wide in North Carolina . The Piedmont's area is approximately 80,000 square miles (210,000 km ). The French word Piedmont comes from

544-569: The Potomac, is owned by the National Park Service to preserve downriver views for Harpers Ferry National Historical Park . The rest of the mountain is in private hands and is by and large undeveloped. The only road crossing of the mountain is Virginia State Route 9 at Hillsboro . The rocks underlying Short Hill are of the late Proterozoic and early Paleozoic eras. The formation consists primarily of metabasalt greenstone deposited during

576-711: The Potomac, the ridge continues as South Mountain in Maryland and Pennsylvania . Short Hill is about 4 miles (6.4 km) east of the crest of the Blue Ridge Mountain , which forms the western border of Loudoun County, and the valley in between the mountains is known as Between the Hills and includes the villages of Loudoun Heights and Neersville . To the east of the mountain is the Catoctin Valley . A small portion of Short Hill, along its northwestern slope and adjoining

608-539: The South where cotton was historically the chief crop. In the central Piedmont region of North Carolina and Virginia , tobacco is the main crop, while in the north region there is more diversity, including orchards , dairying , and general farming . The portion of the Piedmont region in the Southern United States is closely associated with the Piedmont blues , a style of blues music that originated there in

640-613: The core of the Blue Ridge continues northeast through the New Jersey and Hudson River highlands, eventually reaching the Berkshires of Massachusetts and the Green Mountains of Vermont . The Blue Ridge contains the highest mountains in eastern North America south of Baffin Island . About 125 peaks exceed 5,000 feet (1,500 m) in elevation. The highest peak in the Blue Ridge (and in

672-646: The early Catoctin Formation and interspersed with metasedimentary phyllite , schist and breccia , which were deposited later. The rocks were originally deposited contiguous with those of the Blue Ridge Mountains and uplifted together during the Grenville Orogeny . The two ridges were later separated in the late Paleozoic era by movement along the Short Hill Fault, which runs along the western edge of

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704-598: The entire Appalachian chain) is Mount Mitchell in North Carolina at 6,684 feet (2,037 m). There are 39 peaks in North Carolina and Tennessee higher than 6,000 feet (1,800 m); by comparison, in the northern portion of the Appalachian chain only New Hampshire 's Mount Washington rises above 6,000 feet (1,800 m). Southern Sixers is a term used by peak baggers for this group of mountains. The Blue Ridge Parkway runs 469 miles (755 km) along crests of

736-528: The gap, the ridge quickly achieves heights of greater than 600 feet (180 m), and continues for 12 miles (19 km), gradually gaining elevation, before dropping precipitously to the Potomac River . The portion of the mountain south of Hillsboro Gap is known as Signal Mountain for the Union Army signaling station located on its 1,020 feet (310 m) summit during the American Civil War . North of

768-635: The late 19th century. According to the Piedmont Blues Preservation Society, most Piedmont blues musicians came from Virginia, North and South Carolina, and Georgia. During the Great Migration , African Americans migrated to the Piedmont. With the Appalachian Mountains to the west, those who might otherwise have spread into rural areas stayed in cities and were thus exposed to a broader mixture of music than those in, for example,

800-551: The mountain. During the Alleghenian Orogeny the rocks were pushed westward to their present location and uplifted once more. Short Hill Mountain north of Hillsboro is home to one of several AT&T Corporation Project Offices , underground facilities constructed in the 1960s to provide redundant communications services. The Short Hill facility was renovated in the late 2010s and remains active. Piedmont (United States) The Piedmont / ˈ p iː d m ɒ n t /

832-731: The mountains and their perceived color. Within the Blue Ridge province are two major national parks: the Shenandoah National Park in the northern section and the Great Smoky Mountains National Park in the southern section. The Blue Ridge Parkway , a 469-mile (755 km) long scenic highway, connects the two parks and runs along the ridge crest-lines, as does the Appalachian Trail . Eight national forests include George Washington and Jefferson , Cherokee , Pisgah , Nantahala and Chattahoochee . Although

864-456: The range lacks the tree line found at lower elevations in the northern half of the Appalachian range. Statistical modelling predicts that the alpine tree line would exist at above 7,985 feet (2434 m) in the climate zone and latitude of the southern Appalachians. The highest parts of the Blue Ridge are generally vegetated in dense Southern Appalachian spruce-fir forests . The area is host to many animals, including: The largest city located in

896-466: The rural Mississippi delta. Thus, Piedmont blues was influenced by many types of music, such as ragtime , country, and popular songs — styles that had comparatively less influence on blues music in other regions. Many major cities are located on the Atlantic Seaboard fall line , the eastern boundary of the Piedmont. (In Georgia and Alabama, where the Piedmont runs mostly east to west, the fall line

928-490: The southern Appalachians and links two national parks: Shenandoah and Great Smoky Mountains . In many places along the parkway, there are metamorphic rocks ( gneiss ) with folded bands of light-and dark-colored minerals, which sometimes look like the folds and swirls in a marble cake. Most of the rocks that form the Blue Ridge Mountains are ancient granitic charnockites , metamorphosed volcanic formations, and sedimentary limestone. Recent studies completed by Richard Tollo,

960-723: The term "Blue Ridge" is sometimes applied exclusively to the eastern edge or front range of the Appalachian Mountains, the geological definition of the Blue Ridge province extends westward to the Ridge and Valley area, encompassing the Great Smoky Mountains , the Great Balsams , the Roans , the Blacks , and other mountain ranges. In North Carolina, two lower elevation ranges to the east, referred to as foothills , are also often included as "spurs" of

992-455: The valley, on the west side of the Blue Ridge, at the Treaty of Lancaster in 1744. The Blue Ridge Mountains have stunted oak and oak-hickory forest habitats , which comprise most of the Appalachian slope forests. Flora also includes grass, shrubs, hemlock and mixed-oak pine forests. While the Blue Ridge range includes the highest summits in the eastern United States, the climate is nevertheless too warm to support an alpine zone , and thus

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1024-481: The west of the Blue Ridge, between it and the bulk of the Appalachians, lies the Great Appalachian Valley , bordered on the west by the Ridge and Valley province of the Appalachian range. The Blue Ridge Mountains are known for having a bluish color when seen from a distance. Trees put the "blue" in Blue Ridge, from the isoprene released into the atmosphere. This contributes to the characteristic haze on

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