1.
United States Capitol
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The United States Capitol, often called the Capitol Building or Capitol Hill, is the home of the United States Congress, and the seat of the legislative branch of the U. S. federal government. It sits atop Capitol Hill at the end of the National Mall in Washington. Though not at the center of the Federal District, the Capitol forms the origin point for the Districts street-numbering system. The original building was completed in 1800 and was subsequently expanded, like the principal buildings of the executive and judicial branches, the Capitol is built in a distinctive neoclassical style and has a white exterior. Both its east and west elevations are referred to as fronts, though only the east front was intended for the reception of visitors. In 2014, scaffolding was erected around the dome for a project scheduled to be completed by early 2017. All exterior scaffolding was removed by the end of summer 2016, prior to establishing the nations capital in Washington, D. C. the United States Congress and its predecessors had met in Philadelphia, New York City, and a number of other locations. In September 1774, the First Continental Congress brought together delegates from the colonies in Philadelphia, followed by the Second Continental Congress, Congress requested that John Dickinson, the Governor of Pennsylvania, call up the militia to defend Congress from attacks by the protesters. In what became known as the Pennsylvania Mutiny of 1783, Dickinson sympathized with the protesters and refused to remove them from Philadelphia. As a result, Congress was forced to flee to Princeton, New Jersey, on June 21,1783, and met in Annapolis, Maryland, the United States Congress was established upon ratification of the United States Constitution and formally began on March 4,1789. New York City remained home to Congress until July 1790, when the Residence Act was passed to pave the way for a permanent capital. As part of the legislation, Philadelphia was chosen as a capital for ten years, until the nations capital in Washington. Pierre Charles LEnfant was given the task of creating the city plan for the new capital city, in reviewing LEnfants plan, Thomas Jefferson insisted the legislative building be called the Capitol rather than Congress House. The word Capitol comes from Latin and is associated with the Temple of Jupiter Optimus Maximus on Capitoline Hill, the connection between the two is not, however, crystal clear. In spring 1792, United States Secretary of State Thomas Jefferson proposed a competition to solicit designs for the Capitol and the Presidents House. The prize for the competition was $500 and a lot in the Federal City, the most promising of the submissions was by Stephen Hallet, a trained French architect. However, Hallets designs were overly fancy, with too much French influence, a late entry by amateur architect William Thornton was submitted on January 31,1793, to much praise for its Grandeur, Simplicity, and Beauty by Washington, along with praise from Thomas Jefferson. Thornton was inspired by the east front of the Louvre, as well as the Paris Pantheon for the portion of the design
2.
United States Senate
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The United States Senate is the upper chamber of the United States Congress which, along with the House of Representatives, the lower chamber, composes the legislature of the United States. The composition and powers of the Senate are established by Article One of the United States Constitution. S. From 1789 until 1913, Senators were appointed by the legislatures of the states represented, following the ratification of the Seventeenth Amendment in 1913. The Senate chamber is located in the wing of the Capitol, in Washington. It further has the responsibility of conducting trials of those impeached by the House, in the early 20th century, the practice of majority and minority parties electing their floor leaders began, although they are not constitutional officers. This idea of having one chamber represent people equally, while the other gives equal representation to states regardless of population, was known as the Connecticut Compromise, there was also a desire to have two Houses that could act as an internal check on each other. One was intended to be a Peoples House directly elected by the people, the other was intended to represent the states to such extent as they retained their sovereignty except for the powers expressly delegated to the national government. The Senate was thus not designed to serve the people of the United States equally, the Constitution provides that the approval of both chambers is necessary for the passage of legislation. First convened in 1789, the Senate of the United States was formed on the example of the ancient Roman Senate, the name is derived from the senatus, Latin for council of elders. James Madison made the comment about the Senate, In England, at this day, if elections were open to all classes of people. An agrarian law would take place. If these observations be just, our government ought to secure the permanent interests of the country against innovation, landholders ought to have a share in the government, to support these invaluable interests, and to balance and check the other. They ought to be so constituted as to protect the minority of the opulent against the majority, the senate, therefore, ought to be this body, and to answer these purposes, the people ought to have permanency and stability. The Constitution stipulates that no constitutional amendment may be created to deprive a state of its equal suffrage in the Senate without that states consent, the District of Columbia and all other territories are not entitled to representation in either House of the Congress. The District of Columbia elects two senators, but they are officials of the D. C. city government. The United States has had 50 states since 1959, thus the Senate has had 100 senators since 1959. In 1787, Virginia had roughly ten times the population of Rhode Island, whereas today California has roughly 70 times the population of Wyoming and this means some citizens are effectively two orders of magnitude better represented in the Senate than those in other states. Seats in the House of Representatives are approximately proportionate to the population of each state, before the adoption of the Seventeenth Amendment in 1913, Senators were elected by the individual state legislatures
3.
Supreme Court of the United States
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The Supreme Court of the United States is the highest federal court of the United States. In the legal system of the United States, the Supreme Court is the interpreter of federal constitutional law. The Court normally consists of the Chief Justice of the United States and eight justices who are nominated by the President. Once appointed, justices have life tenure unless they resign, retire, in modern discourse, the justices are often categorized as having conservative, moderate, or liberal philosophies of law and of judicial interpretation. Each justice has one vote, and while many cases are decided unanimously, the Court meets in the United States Supreme Court Building in Washington, D. C. The Supreme Court is sometimes referred to as SCOTUS, in analogy to other acronyms such as POTUS. The ratification of the United States Constitution established the Supreme Court in 1789 and its powers are detailed in Article Three of the Constitution. The Supreme Court is the court specifically established by the Constitution. The Court first convened on February 2,1790, by which five of its six initial positions had been filled. According to historian Fergus Bordewich, in its first session, he Supreme Court convened for the first time at the Royal Exchange Building on Broad Street and they had no cases to consider. After a week of inactivity, they adjourned until September, the sixth member was not confirmed until May 12,1790. Because the full Court had only six members, every decision that it made by a majority was made by two-thirds. However, Congress has always allowed less than the Courts full membership to make decisions, under Chief Justices Jay, Rutledge, and Ellsworth, the Court heard few cases, its first decision was West v. Barnes, a case involving a procedural issue. The Courts power and prestige grew substantially during the Marshall Court, the Marshall Court also ended the practice of each justice issuing his opinion seriatim, a remnant of British tradition, and instead issuing a single majority opinion. Also during Marshalls tenure, although beyond the Courts control, the impeachment, the Taney Court made several important rulings, such as Sheldon v. Nevertheless, it is primarily remembered for its ruling in Dred Scott v. Sandford, which helped precipitate the Civil War. In the Reconstruction era, the Chase, Waite, and Fuller Courts interpreted the new Civil War amendments to the Constitution, during World War II, the Court continued to favor government power, upholding the internment of Japanese citizens and the mandatory pledge of allegiance. Nevertheless, Gobitis was soon repudiated, and the Steel Seizure Case restricted the pro-government trend, the Warren Court dramatically expanded the force of Constitutional civil liberties. It held that segregation in public schools violates equal protection and that traditional legislative district boundaries violated the right to vote
4.
Neoclassical architecture
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Neoclassical architecture is an architectural style produced by the neoclassical movement that began in the mid-18th century. In its purest form, it is a style derived from the architecture of classical antiquity, the Vitruvian principles. In form, Neoclassical architecture emphasizes the wall rather than chiaroscuro, Neoclassical architecture is still designed today, but may be labelled New Classical Architecture for contemporary buildings. In Central and Eastern Europe, the style is referred to as Classicism. Many early 19th-century neoclassical architects were influenced by the drawings and projects of Étienne-Louis Boullée, the many graphite drawings of Boullée and his students depict spare geometrical architecture that emulates the eternality of the universe. There are links between Boullées ideas and Edmund Burkes conception of the sublime, the baroque style had never truly been to the English taste. The most popular was the four-volume Vitruvius Britannicus by Colen Campbell, the book contained architectural prints of famous British buildings that had been inspired by the great architects from Vitruvius to Palladio. At first the book featured the work of Inigo Jones. Palladian architecture became well established in 18th-century Britain, at the forefront of the new school of design was the aristocratic architect earl, Richard Boyle, 3rd Earl of Burlington, in 1729, he and William Kent, designed Chiswick House. This House was a reinterpretation of Palladios Villa Capra, but purified of 16th century elements and this severe lack of ornamentation was to be a feature of the Palladianism. In 1734 William Kent and Lord Burlington designed one of Englands finest examples of Palladian architecture with Holkham Hall in Norfolk, the main block of this house followed Palladios dictates quite closely, but Palladios low, often detached, wings of farm buildings were elevated in significance. This classicising vein was also detectable, to a degree, in the Late Baroque architecture in Paris. This shift was even visible in Rome at the redesigned façade for S, by the mid 18th century, the movement broadened to incorporate a greater range of Classical influences, including those from Ancient Greece. The shift to neoclassical architecture is conventionally dated to the 1750s, in France, the movement was propelled by a generation of French art students trained in Rome, and was influenced by the writings of Johann Joachim Winckelmann. The style was adopted by progressive circles in other countries such as Sweden. A second neoclassic wave, more severe, more studied and more consciously archaeological, is associated with the height of the Napoleonic Empire, in France, the first phase of neoclassicism was expressed in the Louis XVI style, and the second in the styles called Directoire or Empire. The Scottish architect Charles Cameron created palatial Italianate interiors for the German-born Catherine II the Great in St. Petersburg, indoors, neoclassicism made a discovery of the genuine classic interior, inspired by the rediscoveries at Pompeii and Herculaneum. These had begun in the late 1740s, but only achieved an audience in the 1760s
5.
United States Bicentennial
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It was a central event in the memory of the American Revolution. The Bicentennial culminated on Sunday, July 4,1976, with the 200th anniversary of the adoption of the Declaration of Independence, the plans for the Bicentennial began when Congress created the American Revolution Bicentennial Commission on July 4,1966. Initially, the Bicentennial celebration was planned as a single city exposition that would be staged in either Philadelphia or Boston, ARBA selected a logo via contest in 1974. Bruce N. Blackburn, co-designer of the modernized NASA insignia used from 1975 to 1992, the logo consisted of a white five-point star inside a stylized star of red, white and blue. It was encircled by the inscription American Revolution Bicentennial 1776–1976 in Helvetica Regular, the logo became a flag that flew at many government facilities throughout the United States and appeared on many other souvenirs and postage stamps issued by the Postal Service. The official Bicentennial events began April 1,1975, when the American Freedom Train launched in Wilmington, Delaware to start its 21-month,25, 388-mile tour of the 48 contiguous states. On April 18,1975, President Gerald Ford traveled to Boston to light a lantern at the historic Old North Church. Festivities included elaborate fireworks in the skies above major American cities, President Ford presided over the display in Washington, D. C. which was televised nationally. A large international fleet of tall-masted sailing ships gathered first in New York City on Independence Day and these nautical parades were named Operation Sail and witnessed by several million observers. The gathering was the second of six such Op Sail events to date, the vessels docked and allowed the general public to tour the ships in both cities, while their crews were entertained on shore at various ethnic celebrations and parties. In addition to the presence of the ships, navies of many nations sent warships to New York harbor for an International Naval Review held the morning of July 4. The review ended just above Liberty Island around 10,30 am, several people threw packages labeled Gulf Oil and Exxon into Boston Harbor in symbolic opposition to corporate power, in the style of the Boston Tea party. Britains Queen Elizabeth and Prince Philip made a visit to the United States to tour the country and attend Bicentennial festivities with President. Their visit aboard the Royal Yacht Britannia included stops in Philadelphia, Washington, Virginia, New York, Connecticut, and Massachusetts. While in Philadelphia on July 6,1976, Queen Elizabeth presented the Bicentennial Bell on behalf of the British people, local observances included painting mailboxes and fire hydrants red, white, and blue. A wave of patriotism and nostalgia swept the nation and there was a feeling that the irate era of the Vietnam War. In Washington, D. C. the Smithsonian Institution opened an exhibition in its Arts and Industries Building that replicated the look. Many of the Smithsonians museum artifacts dated from the 1876 Worlds Fair in Philadelphia that commemorated the 100th anniversary of the independence of the United States, the Smithsonian also opened the new home of the National Air and Space Museum July 1,1976
6.
Museum
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Most large museums are located in major cities throughout the world and more local ones exist in smaller cities, towns and even the countryside. Museums have varying aims, ranging from serving researchers and specialists to serving the general public, the goal of serving researchers is increasingly shifting to serving the general public. There are many types of museums, including art museums, natural history museums, science museums, war museums, the city with the largest number of museums is Mexico City with over 128 museums. According to The World Museum Community, there are more than 55,000 museums in 202 countries, the English museum comes from the Latin word, and is pluralized as museums. The first museum/library is considered to be the one of Plato in Athens, however, Pausanias gives another place called Museum, namely a small hill in Classical Athens opposite to the Akropolis. The hill was called Mouseion after Mousaious, a man who used to sing on the hill, the purpose of modern museums is to collect, preserve, interpret, and display items of artistic, cultural, or scientific significance for the education of the public. The purpose can also depend on ones point of view, to a family looking for entertainment on a Sunday afternoon, a trip to a local history museum or large city art museum could be a fun, and enlightening way to spend the day. To city leaders, a healthy museum community can be seen as a gauge of the health of a city. To a museum professional, a museum might be seen as a way to educate the public about the museums mission, Museums are, above all, storehouses of knowledge. In 1829, James Smithsons bequest, that would fund the Smithsonian Institution, stated he wanted to establish an institution for the increase, Museums of natural history in the late 19th century exemplified the Victorian desire for consumption and for order. Gathering all examples of classification of a field of knowledge for research. As American colleges grew in the 19th century, they developed their own natural history collections for the use of their students, while many large museums, such as the Smithsonian Institution, are still respected as research centers, research is no longer a main purpose of most museums. While there is a debate about the purposes of interpretation of a museums collection, there has been a consistent mission to protect. Much care, expertise, and expense is invested in efforts to retard decomposition in aging documents, artifacts, artworks. All museums display objects that are important to a culture, as historian Steven Conn writes, To see the thing itself, with ones own eyes and in a public place, surrounded by other people having some version of the same experience can be enchanting. Museum purposes vary from institution to institution, some favor education over conservation, or vice versa. For example, in the 1970s, the Canada Science and Technology Museum favored education over preservation of their objects and they displayed objects as well as their functions. One exhibit featured a printing press that a staff member used for visitors to create museum memorabilia
7.
United States Capitol rotunda
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The United States Capitol rotunda is the central rotunda of the United States Capitol in Washington, D. C. Located below the Capitol dome, it is the tallest part of the Capitol and has described as its symbolic. The rotunda is surrounded by corridors connecting the House of Representatives, to the south of the rotunda is the semi-circular National Statuary Hall, which until 1857 was the House of Representatives chamber. To the northeast of the rotunda is the Old Senate Chamber, used by the Senate until 1859 and by the Supreme Court of the United States until 1935. The rotunda is 96 feet in diameter and rises 48 feet to the top of its walls and 180 feet 3 inches to the canopy of the dome, the dome is surmounted by the American Statue of Freedom. It is also used for ceremonial events authorized by concurrent resolution, the doctor and architect William Thornton was the winner of the contest to design the Capitol in 1793. Thornton had first conceived the idea of a central rotunda, however, due to lack of funds or resources, oft-interrupted construction, and the British attack on Washington during the War of 1812, work on the rotunda did not begin until 1818. The rotunda was designed in the style and was intended to evoke the design of the Pantheon. The sandstone rotunda walls rise 48 feet above the floor, everything above this—the Capitol dome–was designed in 1854 by Thomas U, Walter, the fourth Architect of the Capitol. Walter had also designed the Capitols north and south extensions, in 1862, Walter asked painter Constantino Brumidi to design a picture 65 feet in diameter, painted in fresco, on the concave canopy over the eye of the New Dome of the U. S. Capitol. At this time, Brumidi may have added a watercolor canopy design over Walters tentative 1859 sketch, the dome was being finished in the middle of the American Civil War and was constructed from fireproof cast iron. During the Civil War, the rotunda was used as a hospital for Union soldiers. The dome was completed in 1866. Originally the crypt had an open ceiling into the rotunda, visitors can still see the holes in the stone circle that marked the rim of the open space in the rotunda floor. In January 2013, the Architect of the Capitol announced a four-year, $10 million project to repair and conserve the Capitol Domes exterior, the dome and rotunda, which were last conserved in 1960, are showing significant signs of rust and disrepair. There is a danger that decorative ironwork could fall from the rotunda to the space below, without immediate repair, safety netting will be installed. Eight niches in the rotunda hold large, framed historical paintings, all are oil-on-canvas and measure 12 by 18 feet. Four of these are scenes from the American Revolution, painted by John Trumbull and these are Declaration of Independence, Surrender of General Burgoyne, Surrender of Lord Cornwallis, and General George Washington Resigning his Commission
8.
Ionic order
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The Ionic order forms one of the three classical orders of classical architecture, the other two canonic orders being the Doric and the Corinthian. There are two orders, the Tuscan, and the rich variant of Corinthian called the composite order. The Ionic columns are the thinnest and smallest columns out of the three canonic orders, the Ionic capital is characterized by the use of volutes. The Ionic columns normally stand on a base which separates the shaft of the column from the stylobate or platform, since Vitruvius a female character has been ascribed to the Ionic, in contrast to the masculine Doric. The major features of the Ionic order are the volutes of its capital, the only tools required to design these features were a straight-edge, a right angle, string and a compass. Originally the volutes lay in a plane, then it was seen that they could be angled out on the corners. Ionic columns are most often fluted, after a little early experimentation, the number of hollow flutes in the shaft settled at 24. This standardization kept the fluting in a proportion to the diameter of the column at any scale. Roman fluting leaves a little of the surface between each hollow, Greek fluting runs out to a knife edge that was easily scarred. In some instances, the fluting has been omitted, mohr included 8 unfluted Ionic frontal columns on his 1928 design for the railroads St. Louis suburban stop Delmar Station. Pictorial often narrative bas-relief frieze carving provides a feature of the Ionic order. Roman and Renaissance practice condensed the height of the entablature by reducing the proportions of the architrave, the Ionic order originated in the mid-6th century BC in Ionia, the southwestern coastland and islands of Asia Minor settled by Ionian Greeks, where an Ionian dialect was spoken. The Ionic order column was being practiced in mainland Greece in the 5th century BC and it was most popular in the Archaic Period in Ionia. The first of the great Ionic temples was the Temple of Hera on Samos and it stood for only a decade before it was leveled by an earthquake. A longer-lasting 6th century Ionic temple was the Temple of Artemis at Ephesus, the Parthenon, although it conforms mainly to the Doric order, also has some Ionic elements. A more purely Ionic mode to be seen on the Athenian Acropolis is exemplified in the Erechtheum, following the conquests of Alexander the Great in the east, a few examples of the Ionic order can be found as far as Pakistan with the Jandial temple near Taxila. Several examples of capitals displaying Ionic influences can seen as far away as Patna, especially with the Pataliputra capital. Renaissance architectural theorists took his hints, to interpret the Ionic order as matronly in comparison to the Doric order, the Ionic is a natural order for post-Renaissance libraries and courts of justice, learned and civilized
9.
Variegation
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Variegation is the appearance of differently coloured zones in the leaves, and sometimes the stems, of plants. Variegated leaves occur rarely in nature, species with variegated individuals are sometimes found in the understory of tropical rainforests, and this habitat is the source of a number of variegated house plants. The term is sometimes used to refer to colour zonation in flowers, minerals. Typically, stem cuttings, bud and stem grafting, and other methods that results in growth from leaf axil buds will preserve variegation. Cuttings with complete variegation may be if not impossible to propagate. Root cuttings will not usually preserve variegation, since the new tissue is derived from a particular tissue type within the root. Some variegation is due to visual effects caused by reflection of light from the leaf surface and this can happen when an air layer is located just under the epidermis resulting in a white or silvery reflection. It is sometimes called blister variegation, pilea is an example of a house plant that shows this effect. Leaves of most Cyclamen species show such patterned variegation, varying between plants, but consistent within each plant, another type of reflective variegation is caused by hairs on parts of the leaf, which may be coloured differently from the leaf. This is found in various Begonia species and garden hybrids, sometimes venal variegation occurs – the veins of the leaf are picked out in white or yellow. This is due to lack of green tissue above the veins and it can be seen in some aroids. The blessed milk thistle, Silybum marianum, is a plant in which type of venal variegation occurs. A common cause of variegation is the masking of green pigment by other pigments and this often extends to the whole leaf, causing it to be reddish or purplish. On some plants however, consistent zonal markings occur, such as on some clovers, bromeliads, certain Pelargonium, on others, such as the commonly grown forms of Coleus, the variegation can vary widely within a population. In Nymphaea lotus, the lotus, leaf variegations appear under intense illumination. Virus infections may cause patterning to appear on the leaf surface, the patterning is often characteristic of the infection. Examples are the viruses, which produce a mosaic-type effect on the leaf surface or the citrus variegation virus. Recently a virus disease, hosta virus X has been identified that causes mottled leaf coloring in hostas, at first, diseased plants were propagated and grown for their mottled foliage, at the risk of infecting other healthy hostas. g
10.
Marble
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Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Geologists use the marble to refer to metamorphosed limestone, however. Marble is commonly used for sculpture and as a building material and this stem is also the basis for the English word marmoreal, meaning marble-like. In Hungarian it is called márvány, Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. Metamorphism causes variable recrystallization of the carbonate mineral grains. The resulting marble rock is composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the carbonate rock have typically been modified or destroyed. Pure white marble is the result of metamorphism of a very pure limestone or dolomite protolith, green coloration is often due to serpentine resulting from originally magnesium-rich limestone or dolostone with silica impurities. These various impurities have been mobilized and recrystallized by the intense pressure, examples of historically notable marble varieties and locations, White marble has been prized for its use in sculptures since classical times. This preference has to do with its softness, which made it easier to carve, relative isotropy and homogeneity, construction marble is a stone which is composed of calcite, dolomite or serpentine which is capable of taking a polish. More generally in construction, specifically the dimension stone trade, the marble is used for any crystalline calcitic rock useful as building stone. For example, Tennessee marble is really a dense granular fossiliferous gray to pink to maroon Ordovician limestone that geologists call the Holston Formation. Ashgabat, the city of Turkmenistan, was recorded in the 2013 Guinness Book of Records as having the worlds highest concentration of white marble buildings. According to the United States Geological Survey, U. S. domestic marble production in 2006 was 46,400 tons valued at about $18.1 million, compared to 72,300 tons valued at $18.9 million in 2005. Crushed marble production in 2006 was 11.8 million tons valued at $116 million, of which 6.5 million tons was finely ground calcium carbonate and the rest was construction aggregate. For comparison,2005 crushed marble production was 7.76 million tons valued at $58.7 million, of which 4.8 million tons was finely ground calcium carbonate, U. S. dimension marble demand is about 1.3 million tons. The DSAN World Demand for Marble Index has shown a growth of 12% annually for the 2000–2006 period, the largest dimension marble application is tile. In 1998, marble production was dominated by 4 countries that accounted for almost half of production of marble
11.
Quarry
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A quarry is a place from which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate has been excavated from the ground. A quarry is the thing as an open-pit mine from which minerals are extracted. The only non-trivial difference between the two is that open-pit mines that produce building materials and dimension stone are commonly referred to as quarries, the word quarry can also include the underground quarrying for stone, such as Bath stone. The surfaces are polished and finished with varying degrees of sheen or luster, polished slabs are often cut into tiles or countertops and installed in many kinds of residential and commercial properties. Natural stone quarried from the earth is considered a luxury and tends to be a highly durable surface. Quarries in level areas with shallow groundwater or which are located close to surface water often have engineering problems with drainage, generally the water is removed by pumping while the quarry is operational, but for high inflows more complex approaches may be required. For example, the Coquina quarry is excavated to more than 60 feet below sea level, to reduce surface leakage, a moat lined with clay was constructed around the entire quarry. Ground water entering the pit is pumped up into the moat, as a quarry becomes deeper, water inflows generally increase and it also becomes more expensive to lift the water higher during removal, this can become the limiting factor in quarry depth. Some water-filled quarries are worked from beneath the water, by dredging, many people and municipalities consider quarries to be eyesores and require various abatement methods to address problems with noise, dust, and appearance. One of the effective and famous examples of successful quarry restoration is Butchart Gardens in Victoria, BC. A further problem is pollution of roads from trucks leaving the quarries, to control and restrain the pollution of public roads, wheel washing systems are becoming more common. Many quarries naturally fill with water after abandonment and become lakes, water-filled quarries can be very deep with water, often 50 feet or more, that is often surprisingly cold. Unexpectedly cold water can cause a swimmers muscles to weaken, it can also cause shock. Though quarry water is very clear, submerged quarry stones. Several people drown in quarries each year, however, many inactive quarries are converted into safe swimming sites
12.
Potomac River
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The Potomac River /pəˈtoʊmək/ is located along the mid-Atlantic Ocean coast of the United States and flows into the Chesapeake Bay. The river is approximately 405 miles long, with an area of about 14,700 square miles. In terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the United States, over 5 million people live within the Potomac watershed. The river forms part of the borders between Maryland and Washington, D. C. on the left descending bank and West Virginia and Virginia on the right descending bank. The majority of the lower Potomac River is part of the State of Maryland, exceptions include a small tidal portion within the District of Columbia, and the border with Virginia being delineated from point to point. Except for a portion of its headwaters in West Virginia. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, the Potomac River runs 405 miles from the Fairfax Stone in West Virginia on the Allegheny Plateau to Point Lookout, Maryland, and drains 14,679 square miles. The length of the river from the junction of its North and South Branches to Point Lookout is 302 miles, the average flow is 10,800 ft³/s. The largest flow recorded on the Potomac at Washington, D. C. was in March 1936 when it reached 425,000 ft³/s. The lowest flow recorded at the same location was 600 ft³/s in September,1966. The source of the North Branch is at the Fairfax Stone located at the junction of Grant, Tucker, the source of the South Branch is located near Hightown in northern Highland County, Virginia. The rivers two branches converge just east of Green Spring in Hampshire County, West Virginia, to form the Potomac. Once the Potomac drops from the Piedmont to the Coastal Plain at Little Falls, tides further influence the river as it passes through Washington, D. C. salinity in the Potomac River Estuary increases thereafter with distance downstream. The estuary also widens, reaching 11 statute miles wide at its mouth, Potomac is a European spelling of Patowmeck, the Algonquian name of a Native American village, perhaps meaning something brought. Native Americans had different names for different parts of the river, calling the river above Great Falls Cohongarooton, meaning honking geese and Patawomke below the fall, meaning river of swans. The spelling of the name has many forms over the years from Patawomeke to Patawomeck, Patowmack. The rivers name was decided upon as Potomac by the Board on Geographic Names in 1931. The river itself is at least two years old, likely extending back ten to twenty million years before present when the Atlantic Ocean lowered and exposed coastal sediments along the fall line
