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Mount Rushmore National Memorial is a national memorial centered on a colossal sculpture carved into the granite face of Mount Rushmore ( Lakota: ''Tȟuŋkášila Šákpe'', or Six Grandfathers) in the Black Hills near
Keystone, South Dakota Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 240 at the 2020 census. It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, servin ...
, United States. Sculptor Gutzon Borglum created the sculpture's design and oversaw the project's execution from 1927 to 1941 with the help of his son,
Lincoln Borglum James Lincoln de la Mothe Borglum (April 9, 1912 – January 27, 1986) was an American sculptor, photographer, author and engineer; he was best known for overseeing the completion of the Mount Rushmore National Memorial after the death of the ...
. The sculpture features the heads of four United States Presidents recommended by Borglum: George Washington (1732–1799),
Thomas Jefferson Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. He was previously the nati ...
(1743–1826),
Theodore Roosevelt Theodore Roosevelt Jr. ( ; October 27, 1858 – January 6, 1919), often referred to as Teddy or by his initials, T. R., was an American politician, statesman, soldier, conservationist, naturalist, historian, and writer who served as the 26t ...
(1858–1919) and
Abraham Lincoln Abraham Lincoln ( ; February 12, 1809 – April 15, 1865) was an American lawyer, politician, and statesman who served as the 16th president of the United States from 1861 until his assassination in 1865. Lincoln led the nation thro ...
(1809–1865). The four presidents were chosen to represent the nation's birth, growth, development and preservation, respectively. The memorial park covers and the mountain itself has an elevation of above sea level.Mount Rushmore, South Dakota
(November 1, 2004). Peakbagger.com. Retrieved March 13, 2006.
The sculptor and tribal representatives settled on Mount Rushmore, which also has the advantage of facing southeast for maximum sun exposure. Doane Robinson wanted it to feature American West heroes, such as Lewis and Clark, their expedition guide Sacagawea, Oglala Lakota chief Red Cloud, Buffalo Bill Cody, and Oglala Lakota chief Crazy Horse. Borglum believed that the sculpture should have broader appeal and chose the four presidents. Peter Norbeck,
U.S. senator The United States Senate is the upper chamber of the United States Congress, with the House of Representatives being the lower chamber. Together they compose the national bicameral legislature of the United States. The composition and powe ...
from South Dakota, sponsored the project and secured federal funding. Construction began in 1927 and the presidents' faces were completed between 1934 and 1939. After Gutzon Borglum died in March 1941, his son Lincoln took over as leader of the construction project. Each president was originally to be depicted from head to waist, but lack of funding forced construction to end on October 31, 1941. Sometimes referred to as the "Shrine of Democracy", Mount Rushmore attracts more than two million visitors annually.


History

Mount Rushmore was conceived with the intention of creating a site to lure tourists, representing "not only the wild grandeur of its local geography but also the triumph of western civilization over that geography through its anthropomorphic representation." Though for the latest occupants of the land at the time, the Lakota Sioux, as well as other tribes, the monument in their view "came to epitomize the loss of their sacred lands and the injustices they've suffered under the U.S. government." Under the Treaty of 1868, the U.S. government promised the territory, including the entirety of the Black Hills, to the Sioux "so long as the buffalo may range thereon in such numbers as to justify the chase." After the discovery of gold on the land, American settlers migrated to the area in the 1870s. The federal government then forced the Sioux to relinquish the Black Hills portion of their reservation. The four presidential faces were said to be carved into the granite with the intention of symbolizing "an accomplishment born, planned, and created in the minds and by the hands of Americans for Americans".


Naming

Mount Rushmore is known to the Lakota Sioux as "The Six Grandfathers" (Tȟuŋkášila Šákpe) or "Cougar Mountain" (Igmútȟaŋka Pahá); but American settlers knew it variously as Cougar Mountain, Sugarloaf Mountain, Slaughterhouse Mountain and Keystone Cliffs. As Six Grandfathers, the mountain was on the route that Lakota leader Black Elk took in a spiritual journey that culminated at Black Elk Peak. Following a series of
military campaigns A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct ...
from 1876 to 1878, the United States asserted control over the area, a claim that is still disputed on the basis of the 1868 Treaty of Fort Laramie. Beginning with a prospecting expedition in 1885 with David Swanzey (husband of Carrie Ingalls), and Bill Challis, wealthy investor
Charles E. Rushmore Charles Edward Rushmore (December 2, 1857 – October 31, 1931) was an American businessman and attorney for whom Mount Rushmore is named. Born in New York City, he was the son of Edward Carman Rushmore and Mary Eliza (née Dunn) Rushmore, of Tux ...
began visiting the area regularly on prospecting and hunting trips. He repeatedly joked with colleagues about naming the mountain after himself.Keystone Area Historical Societ
Keystone Characters
. Retrieved October 3, 2006.
The United States Board of Geographic Names officially recognized the name "Mount Rushmore" in June 1930.


Concept, design and funding

Historian Doane Robinson conceived the idea for Mount Rushmore in 1923 to promote tourism in South Dakota. In 1924, Robinson persuaded sculptor Gutzon Borglum to travel to the Black Hills region to ensure the carving could be accomplished. The original plan was to make the carvings in
granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies und ...
pillars known as the Needles. However, Borglum realized that the eroded Needles were too thin to support sculpting. He chose Mount Rushmore, a grander location, partly because it faced southeast and enjoyed maximum exposure to the sun. Borglum said upon seeing Mount Rushmore, "America will march along that skyline." Borglum had been involved in sculpting the
Stone Mountain Memorial Stone Mountain is a quartz monzonite dome monadnock and the site of Stone Mountain Park, east of Atlanta, Georgia. Outside the park is the small city of Stone Mountain, Georgia. The park is the most visited tourist site in the state of Georgia. ...
to Confederate leaders in
Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to t ...
, but was in disagreement with the officials there. U.S. Senator Peter Norbeck and Congressman William Williamson of South Dakota introduced bills in early 1925 for permission to use federal land, which passed easily. South Dakota legislation had less support, only passing narrowly on its third attempt, which Governor
Carl Gunderson Carl Gunderson (June 20, 1864February 26, 1933)''Biographical Directory of the South Dakota Legislature, 1889–1989'' (1989), p. 400 was an American politician who served as the 11th Governor of South Dakota. Gunderson, a Republican from Mit ...
signed into law on March 5, 1925. Private funding came slowly and Borglum invited President Calvin Coolidge to an August 1927 dedication ceremony, at which he promised federal funding. Congress passed the Mount Rushmore National Memorial Act, signed by Coolidge, which authorized up to $250,000 in matching funds. The 1929 presidential transition to
Herbert Hoover Herbert Clark Hoover (August 10, 1874 – October 20, 1964) was an American politician who served as the 31st president of the United States from 1929 to 1933 and a member of the Republican Party (United States), Republican Party, holding o ...
delayed funding until an initial federal match of $54,670.56 was acquired. Carving started in 1927 and ended in 1941 with no fatalities.


Construction

Between October 4, 1927, and October 31, 1941, Gutzon Borglum and 400 workers sculpted the colossal carvings of United States Presidents George Washington,
Thomas Jefferson Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. He was previously the nati ...
,
Theodore Roosevelt Theodore Roosevelt Jr. ( ; October 27, 1858 – January 6, 1919), often referred to as Teddy or by his initials, T. R., was an American politician, statesman, soldier, conservationist, naturalist, historian, and writer who served as the 26t ...
, and
Abraham Lincoln Abraham Lincoln ( ; February 12, 1809 – April 15, 1865) was an American lawyer, politician, and statesman who served as the 16th president of the United States from 1861 until his assassination in 1865. Lincoln led the nation thro ...
to represent the first 150 years of American history. These presidents were selected by Borglum because of their role in preserving the Republic and expanding its territory. The carving of Mount Rushmore involved the use of dynamite, followed by the process of "honeycombing", a process where workers drill holes close together, allowing small pieces to be removed by hand. In total, about of rock were blasted off the mountainside. The image of Thomas Jefferson was originally intended to appear in the area at Washington's right, but after the work there was begun, the rock was found to be unsuitable, so the work on the Jefferson figure was dynamited, and a new figure was sculpted to Washington's left. The chief carver of the mountain was
Luigi Del Bianco Luigi Del Bianco (May 8, 1892 - January 20, 1969) was an Italian-American sculptor, and chief carver of Mount Rushmore. Early life and education Bianco was born on a ship near Le Havre, France, on May 8, 1892, to Vincenzo and Osvalda Del Bianco ...
, an artisan and stonemason in Port Chester, New York. Del Bianco emigrated to the U.S. from Friuli in Italy and was chosen to work on this project because of his understanding of sculptural language and ability to imbue emotion in the carved portraits. In 1933, the
National Park Service The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government within the United States Department of the Interior, U.S. Department of ...
took Mount Rushmore under its jurisdiction. Julian Spotts helped with the project by improving its infrastructure. For example, he had the tram upgraded so it could reach the top of Mount Rushmore for the ease of workers. By July 4, 1934, Washington's face had been completed and was dedicated. The face of Thomas Jefferson was dedicated in 1936, and the face of Abraham Lincoln was dedicated on September 17, 1937. In 1937, a bill was introduced in Congress to add the head of civil-rights leader Susan B. Anthony, but a rider was passed on an appropriations bill requiring federal funds be used to finish only those heads that had already been started at that time.American Experience
"Timeline: Mount Rushmore" (2002). Retrieved March 20, 2006.
In 1939, the face of Theodore Roosevelt was dedicated. The Sculptor's Studio – a display of unique plaster models and tools related to the sculpting – was built in 1939 under the direction of Borglum. Borglum died from an embolism in March 1941. His son,
Lincoln Borglum James Lincoln de la Mothe Borglum (April 9, 1912 – January 27, 1986) was an American sculptor, photographer, author and engineer; he was best known for overseeing the completion of the Mount Rushmore National Memorial after the death of the ...
, continued the project. Originally, it was planned that the figures would be carved from head to waist, but insufficient funding forced the carving to end. Borglum had also planned a massive panel in the shape of the Louisiana Purchase commemorating in eight-foot-tall gilded letters the
Declaration of Independence A declaration of independence or declaration of statehood or proclamation of independence is an assertion by a polity in a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of ...
, U.S. Constitution, Louisiana Purchase, and seven other territorial acquisitions from the Alaska purchase to the Panama Canal Zone. In total, the entire project cost US$989,992.32 (equivalent to $ in ).Mount Rushmore National Memorial
. Tourism in South Dakota. Laura R. Ahmann. Retrieved March 19, 2006.
Nick Clifford, the last remaining carver, died in November 2019 at age 98.


Visitor center

Harold Spitznagel and Cecil Doty designed the original visitor center, finished in 1957. These structures were part of the Mission 66 effort to improve visitors' facilities at national parks and monuments across the country. Ten years of redevelopment work culminated with the completion of extensive visitor facilities and sidewalks in 1998, such as a Visitor Center, the
Lincoln Borglum Museum The Lincoln Borglum Museum is located in the Mount Rushmore National Memorial near Keystone, South Dakota. It features two 125-seat theaters that show a 13-minute movie about Mount Rushmore. A view thought by many to be one of the best is located a ...
, and the Presidential Trail. Maintenance of the memorial requires mountain climbers to monitor and seal cracks annually. Due to budget constraints, the memorial is not regularly cleaned to remove lichens. However, on July 8, 2005, Alfred Kärcher, a German manufacturer of pressure washing and steam cleaning machines, conducted a free cleanup operation which lasted several weeks, using pressurized water at over . On October 15, 1966, Mount Rushmore was listed on the
National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artist ...
. A 500-word essay giving the history of the United States by
Nebraska Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the so ...
student William Andrew Burkett was selected as the college-age group winner in a 1934 competition, and that essay was placed on the Entablature on a bronze plate in 1973. In 1991, President George H. W. Bush officially dedicated Mount Rushmore.


Proposals of adding additional faces

In 1937, when the sculpture was not yet complete, a bill in Congress supporting the addition of women's rights activist Susan B. Anthony failed. When the sculpture was completed in 1941, the sculptors said that the remaining rock was not suitable for additional carvings. This stance was shared by RESPEC, an engineering firm charged with monitoring the stability of the rock in 1989. However, proposals of additional sculptures have been made regardless. These include John F. Kennedy after his assassination in 1963, and Ronald Reagan in 1985 and 1999 – the latter proposal receiving a debate in Congress at the time.
Barack Obama Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th president of the United States from 2009 to 2017. A member of the Democratic Party (United States), Democratic Party, Obama was the first Af ...
was asked about his own potential addition in 2008 and he joked that his ears were too large.
Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of ...
has on occasion expressed interest in his own addition to the mountain. During a 2017 rally in Ohio, he said "I'd ask whether or not you some day think I will be on Mount Rushmore. If I did it joking – totally joking, having fun – the fake news media will say, ‘He believes he should be on Mount Rushmore.’ So I won't say it.” By the 2018 account of South Dakota Governor
Kristi Noem Kristi Lynn Noem (; née Arnold; born November 30, 1971) is an American politician serving as the 33rd governor of South Dakota since 2019. A member of the Republican Party, she was the U.S. representative for from 2011 to 2019 and a member ...
, Trump described the potential addition as his "dream" in conversation. In August 2020 it was alleged that the previous year, White House aides working for President
Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of ...
made contact with Noem the previous year about the process of adding additional presidents, including Trump, to the monument. Trump denied the accusation on his official Twitter account, saying he never "suggested it although, based on all of the many things accomplished during the first years, perhaps more than any other Presidency, sounds like a good idea to me!" According to a survey of political science experts conducted by ''
The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...
'' in 2018, Franklin D. Roosevelt was the most popular choice for addition to Mount Rushmore, regardless of party affiliation. In total, 66% of respondents would choose Roosevelt, followed by Barack Obama at 7% and Ronald Reagan at 5%. Among Democrats, Roosevelt was chosen by 75%, followed by Obama at 11%. Among
Republicans Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, Roosevelt was chosen by 43%, followed by Reagan at 19%. Among Independents, Roosevelt was chosen by 57%, followed by both Reagan and Dwight D. Eisenhower at 11%.


Tourism

Tourism is South Dakota's second-largest industry, and Mount Rushmore is the state's top tourist attraction. 2,185,447 people visited the park in 2012. The popularity of the location, as with many other national monuments, derives from its immediate recognizability; "there are no substitutes for iconic resources such as the Statue of Liberty, the Lincoln Memorial, or Mount Rushmore. These locations are one of a kind places".Thomas J. Liu, John B. Loomis, and Linda J. Bilmes,
Exploring the contribution of National Parks to the entertainment industry's intellectual property
, in Linda J. Bilmes and John B. Loomis, ''Valuing U.S. National Parks and Programs: America's Best Investment'' (Routledge, 2020)
p. 95–98
However, Mount Rushmore also provides access to a surrounding environment of wilderness, which distinguishes it from the typical proximity of national monuments to urban centers like Washington, D.C., and New York City. In the 1950s and 1960s, local Lakota Sioux elder Benjamin Black Elk (son of medicine man Black Elk, who had been present at the
Battle of the Little Bighorn The Battle of the Little Bighorn, known to the Lakota and other Plains Indians as the Battle of the Greasy Grass, and also commonly referred to as Custer's Last Stand, was an armed engagement between combined forces of the Lakota Sioux, No ...
) was known as the "Fifth Face of Mount Rushmore", posing for photographs with thousands of tourists daily in his native attire. The South Dakota State Historical Society notes that he was one of the most photographed people in the world over that 20-year period.


Hall of Records

Borglum originally envisioned a grand Hall of Records where America's greatest historical documents and artifacts could be protected and shown to tourists. He managed to start the project, but cut only 70 feet (21 m) into the rock before work stopped in 1939 to focus on the faces. In 1998, an effort to complete Borglum's vision resulted in a repository being constructed inside the mouth of the cave housing 16 enamel panels that contained biographical and historical information about Mount Rushmore as well as the texts of the documents Borglum wanted to preserve there. The vault consists of a teakwood box (housing the 16 panels) inside of a titanium vault placed in the ground with a granite capstone. The text found on the 16 panels can be found below.


Conservation

The ongoing conservation of the site is overseen by the National Park Service. Physical efforts to conserve the monument have included replacement of the sealant applied originally to cracks in the stone by Gutzon Borglum, which had proved ineffective at providing water resistance. The components of Borglum's sealant included linseed oil, granite dust, and white lead, but a modern silicone replacement for the cracks is now used, disguised with granite dust. In 1998, electronic monitoring devices were installed to track movement in the topology of the sculpture to an accuracy of three millimeters. The site was digitally recorded in 2009 using a terrestrial laser scanning method as part of the international Scottish Ten project, providing a high-resolution record to aid the conservation of the site. This data was made publicly accessible online.


Ecology

The flora and fauna of Mount Rushmore are similar to those of the rest of the Black Hills region of South Dakota. Birds including the turkey vulture,
golden eagle The golden eagle (''Aquila chrysaetos'') is a bird of prey living in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. They are one of the best-known birds ...
, bald eagle, red-tailed hawk, swallows and white-throated swifts fly around Mount Rushmore, occasionally making nesting spots in the ledges of the mountain. Smaller birds, including songbirds, nuthatches, woodpeckers and flycatchers inhabit the surrounding pine forests. Terrestrial mammals include the mouse, least chipmunk, red squirrel, skunk, porcupine,
raccoon The raccoon ( or , ''Procyon lotor''), sometimes called the common raccoon to distinguish it from other species, is a mammal native to North America. It is the largest of the procyonid family, having a body length of , and a body weight o ...
, beaver, badger, coyote, bighorn sheep, bobcat, elk, mule deer, yellow-bellied marmot, and American bison. The striped chorus frog, western chorus frog, and northern leopard frog also inhabit the area, along with several species of
snake Snakes are elongated, limbless, carnivorous reptiles of the suborder Serpentes . Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more j ...
. Grizzly Bear Brook and Starling Basin Brook, the two streams in the memorial, support fish such as the longnose dace and the brook trout. Mountain goats are not indigenous to the region. Those living near Mount Rushmore are descendants of a tribe that Canada gifted to Custer State Park in 1924, which later escaped. At lower elevations, coniferous trees, mainly the ponderosa pine, surround most of the monument, providing shade from the sun. Other trees include the bur oak, the Black Hills spruce, and the cottonwood. Nine species of shrubs grow near Mount Rushmore. There is also a wide variety of wildflowers, including especially the snapdragon, sunflower, and violet. Towards higher elevations, plant life becomes sparser. However, only approximately five percent of the plant species found in the Black Hills are indigenous to the region. The area receives about of precipitation on average per year, enough to support abundant animal and plant life. Trees and other plants help to control surface runoff. Dikes, seeps, and springs help to dam up water that is flowing downhill, providing watering spots for animals. In addition, stones like
sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...
and
limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms wh ...
help to hold
groundwater Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidat ...
, creating aquifers. A 2016 investigation by the U.S. Geological Survey found unusually high concentrations of perchlorate in the surface water and groundwater of the area. A sample collected from a stream had a maximum perchlorate concentration of 54 micrograms per liter, roughly 270 times higher than samples taken from locations outside the area. The report concluded the probable cause of the contamination was the aerial fireworks displays that had taken place on Independence Days from 1998 to 2009. The National Park Service also reported that at least 27 forest fires around Mount Rushmore in that same period (1998 to 2009) have been caused by fireworks displays. A study of the fire scars present in tree ring samples indicates that forest fires occur in the ponderosa forests surrounding Mount Rushmore around every 27 years. Large fires are not common. Most events have been ground fires that serve to clear forest debris. The area is a climax community. Recent pine beetle infestations have threatened the forest.


Geography


Geology

Mount Rushmore is largely composed of
granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies und ...
. The memorial is carved on the northwest margin of the Black Elk Peak granite batholith in the Black Hills of South Dakota, so the geologic formations of the heart of the Black Hills region are also evident at Mount Rushmore. The batholith
magma Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natura ...
intruded into the pre-existing mica schist rocks during the
Proterozoic The Proterozoic () is a geological eon spanning the time interval from 2500 to 538.8million years ago. It is the most recent part of the Precambrian "supereon". It is also the longest eon of the Earth's geologic time scale, and it is subdivided ...
, 1.6 billion years ago.Geologic Activity
National Park Service.
Coarse grained pegmatite dikes are associated with the
granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies und ...
intrusion of Black Elk Peak and are visibly lighter in color, thus explaining the light-colored streaks on the foreheads of the presidents. The Black Hills granites were exposed to
erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is di ...
during the
Neoproterozoic The Neoproterozoic Era is the unit of geologic time from 1 billion to 538.8 million years ago. It is the last era of the Precambrian Supereon and the Proterozoic Eon; it is subdivided into the Tonian, Cryogenian, and Ediacaran periods. It is ...
, but were later buried by
sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...
and other sediments during the
Cambrian The Cambrian Period ( ; sometimes symbolized Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million years ag ...
. Remaining buried throughout the Paleozoic, they were re-exposed again during the Laramide orogeny around 70 million years ago. The Black Hills area was uplifted as an elongated geologic dome. Subsequent erosion stripped the granite of the overlying sediments and the softer adjacent schist. Some schist does remain and can be seen as the darker material just below the sculpture of Washington. The tallest mountain in the region is Black Elk Peak (). Borglum selected Mount Rushmore as the site for several reasons. The rock of the mountain is composed of smooth, fine-grained granite. The durable granite erodes only every 10,000 years, thus was more than sturdy enough to support the sculpture and its long-term exposure. The mountain's height of above sea level made it suitable, and because it faces the southeast, the workers also had the advantage of sunlight for most of the day. It is not possible to add another president to the memorial, because the rock that surrounds the existing faces is not suitable for additional carving, and because if additional sculpting work were done, that might create instabilities in the existing carvings.


Soils

The Mount Rushmore area is underlain by well drained
alfisol Alfisols are a soil order in USDA soil taxonomy. Alfisols form in semi-arid to humid areas, typically under a hardwood forest cover. They have a clay-enriched subsoil and relatively high native fertility. "Alf" refers to aluminium (Al) and iron ( ...
soils of very gravelly loam (Mocmount) to silt loam (Buska) texture, brown to dark grayish brown.


Climate

Mount Rushmore has a dry-winter
humid continental climate A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers and freez ...
(''Dwb'' in the
Köppen climate classification The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, nota ...
). It is inside a
USDA Plant Hardiness Zone A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations. The original and most wide ...
of 5a, meaning certain plant life in the area can withstand a low temperature of no less than . The two wettest months of the year are May and June. Orographic lift causes brief but strong afternoon thunderstorms during the summer.


In popular culture

Mount Rushmore has been depicted in multiple films, comic books, and television series. Its functions vary from settings for action scenes to the site of hidden locations. Its most famous appearance is as the location of the final chase scene in the 1959 film '' North by Northwest.'' It is used as a secret base of operations by the protagonists in the 2004 film '' Team America: World Police'', and the secret underground city of Cíbola is located there in the 2007 film '' National Treasure: Book of Secrets''. In some films, the presidential faces are replaced with others; examples include the 1980 film '' Superman II'' and the 1996 film '' Mars Attacks!'' where the villains add their faces to the monument, and the 2003 film ''
Head of State A head of state (or chief of state) is the public persona who officially embodies a state (polity), state#Foakes, Foakes, pp. 110–11 " he head of statebeing an embodiment of the State itself or representatitve of its international p ...
'' where the newly elected president's face is added. In works showing attacks on landmarks to signify the scope of a threat, Mount Rushmore is a common target; examples include the aforementioned facial replacements in ''Superman II'' and ''Mars Attacks!'' as well as natural disasters in works like the 2006 miniseries '' 10.5: Apocalypse'' and terrorist attacks as in the 1997 film '' The Peacekeeper''. An atypical representation of the monument appears in the 2013 film ''
Nebraska Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the so ...
'', where instead of being treated with reverence it is criticized for being unfinished.Walter Metz,
Review: Nebraska. Dir. Alexander Payne. Paramount Vantage, 2013
. ''Middle West Review'' Volume 1, Number 1, (University of Nebraska Press, Fall 2014), p. 154–55.


Controversies

The Treaty of Fort Laramie (1868) had granted the Black Hills to the Lakota people in perpetuity, but the United States took the area from the tribe after the Great Sioux War of 1876. Members of the
American Indian Movement The American Indian Movement (AIM) is a Native American grassroots movement which was founded in Minneapolis, Minnesota in July 1968, initially centered in urban areas in order to address systemic issues of poverty, discrimination, and police br ...
led an occupation of the monument in 1971, naming it "Mount Crazy Horse", and Lakota holy man John Fire Lame Deer planted a prayer staff on top of the mountain. Lame Deer said that the staff formed a symbolic shroud over the presidents' faces "which shall remain dirty until the treaties concerning the Black Hills are fulfilled."Matthew Glass, "Producing Patriotic Inspiration at Mount Rushmore," ''Journal of the American Academy of Religion'', Vol. 62, No. 2. (Summer, 1994), pp. 265–283. Construction on the
Crazy Horse Memorial The Crazy Horse Memorial is a mountain monument under construction on privately held land in the Black Hills, in Custer County, South Dakota, United States. It will depict the Oglala Lakota warrior Crazy Horse, riding a horse and pointing to his ...
began in 1940 elsewhere in the Black Hills. Ostensibly to commemorate the Native American leader and as a response to Mount Rushmore, if completed it would be larger than Mount Rushmore. The Crazy Horse Memorial Foundation has rejected offers of federal funds. Its construction has the support of some Lakota chiefs, but it is the subject of controversy, even among Native American tribes. The 1980
United States Supreme Court The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all U.S. federal court cases, and over state court cases that involve a point ...
decision '' United States v. Sioux Nation of Indians'' ruled that the Sioux had not received just compensation for their land in the Black Hills, which includes Mount Rushmore. The court proposed $102 million as compensation for the loss of the Black Hills. This compensation was valued at $1.3 billion in 2011, and – with accumulated interest – nearly $2 billion in 2021. In 2020, Oglala Lakota Nation citizen and Indigenous activist Nick Tilsen explained that his people would not accept a settlement, "because we won't settle for anything less than the full return of our lands as stipulated by the treaties our nations signed and agreed upon." In 2004, Gerard Baker was appointed superintendent of the park, the first and so far only Native American in that role. Baker stated that he will open up more "avenues of interpretation", and that the four presidents are "only one avenue and only one focus." On July 3, 2020, scores of activists demonstrated when President
Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of ...
held a campaign rally at Mount Rushmore. The foremost message was that Indigenous people want their land back, pursuant to the ongoing dispute of the Black Hills land claim. Twenty people were arrested.


Legacy and commemoration

On August 11, 1952, the U.S. Post Office issued the Mount Rushmore Memorial 3-cent commemorative stamp on the 25th anniversary of the dedication of the Mount Rushmore National Memorial. On January 2, 1974, a 26-cent airmail stamp depicting the monument was also issued. In 1991 the United States Mint released commemorative silver dollar, half-dollar, and five-dollar coins celebrating the 50th anniversary of the monument's dedication, and the sculpture was the main subject of the 2006 South Dakota state quarter. In music, American composer Michael Daugherty's 2010 piece for chorus and orchestra, "Mount Rushmore," depicts each of the four presidents in separate movements. The piece sets texts by George Washington, William Billings,
Thomas Jefferson Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. He was previously the nati ...
, Maria Cosway,
Theodore Roosevelt Theodore Roosevelt Jr. ( ; October 27, 1858 – January 6, 1919), often referred to as Teddy or by his initials, T. R., was an American politician, statesman, soldier, conservationist, naturalist, historian, and writer who served as the 26t ...
, and
Abraham Lincoln Abraham Lincoln ( ; February 12, 1809 – April 15, 1865) was an American lawyer, politician, and statesman who served as the 16th president of the United States from 1861 until his assassination in 1865. Lincoln led the nation thro ...
. By contrast, the song, "Little Snakes", by Protest The Hero, "addresses the violent colonial history involved in the sculpting of Mount Rushmore", critiquing the monument as a symbol of
colonialism Colonialism is a practice or policy of control by one people or power over other people or areas, often by establishing colonies and generally with the aim of economic dominance. In the process of colonisation, colonisers may impose their rel ...
, referencing the genocide of indigenous peoples and the ownership of slaves by George Washington and
Thomas Jefferson Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. He was previously the nati ...
. The Washington Nationals baseball club uses large foam rubber depictions of the "Rushmore Four" in both their marketing campaigns and in a series of in-stadium promotions such as the Presidents Race.


See also

* List of colossal sculpture ''in situ'' * List of tallest statues *
Crazy Horse Memorial The Crazy Horse Memorial is a mountain monument under construction on privately held land in the Black Hills, in Custer County, South Dakota, United States. It will depict the Oglala Lakota warrior Crazy Horse, riding a horse and pointing to his ...
, another large sculpture in the Black Hills *
Atatürk Mask The ''Atatürk Mask'' ( tr, Atatürk Maskı) is a large concrete bust of Mustafa Kemal Atatürk, founder of modern Turkey, located in Buca district of İzmir. The sculpture was completed in 2009 at a cost of ₺4.2 million. History Buca Municip ...
, another large relief sculpture


References


Further reading

* * * Coutant, Arnaud (2014).
Les Visages de l'Amérique, les constructeurs d'une démocratie fédérale
'. Mare et Martin (). French study about the Four Presidents, Life, presidency, influence about American political evolution. (Archived link) * * * Larner, Jesse (2002). ''Mount Rushmore: An Icon Reconsidered''. New York: Nation Books. * Taliaferro, John (2002). ''Great White Fathers: The Story of the Obsessive Quest to Create Mount Rushmore''. New York: PublicAffairs. . Puts the creation of the monument into a historical and cultural context. * ''The National Parks: Index 2001–2003''. Washington, D.C.:
United States Department of the Interior The United States Department of the Interior (DOI) is one of the executive departments of the U.S. federal government headquartered at the Main Interior Building, located at 1849 C Street NW in Washington, D.C. It is responsible for the m ...
. .


External links

* {{DEFAULTSORT:Mount Rushmore National Memorials of the United States Black Hills Landforms of Pennington County, South Dakota Monuments and memorials in South Dakota National Park Service areas in South Dakota Outdoor sculptures in South Dakota Protected areas of Pennington County, South Dakota Rushmore Buildings and monuments honoring American presidents in the United States Granite sculptures in South Dakota Rock formations of South Dakota Symbols of South Dakota Monuments and memorials to Abraham Lincoln in the United States Monuments and memorials to George Washington in the United States Statues of Abraham Lincoln Statues of George Washington Cultural depictions of Abraham Lincoln Statues of Theodore Roosevelt Cultural depictions of Thomas Jefferson Great Sioux War of 1876 1941 sculptures Mountain monuments and memorials Monuments and memorials on the National Register of Historic Places in South Dakota Sculptures in South Dakota Sculptures by Gutzon Borglum Sculptures of presidents of the United States Colossal statues in the United States Statues of Thomas Jefferson Unfinished sculptures National Register of Historic Places in Pennington County, South Dakota