The Economist is an English-language weekly magazine-format newspaper owned by the Economist Group and edited at offices in London. Continuous publication began under its founder James Wilson in September 1843. In 2015, its average weekly circulation was a little over 1.5 million, about half of which were sold in the United States. Pearson PLC held a 50% shareholding via The Financial Times Limited until August 2015. At that time, Pearson sold their share in the Economist; the Agnelli family's Exor paid £287m to raise their stake from 4.7% to 43.4% while the Economist paid £182m for the balance of 5.04m shares which will be distributed to current shareholders. Aside from the Agnelli family, smaller shareholders in the company include Cadbury, Schroder and other family interests as well as a number of staff and former staff shareholders. A board of trustees formally appoints the editor. Although The Economist has a global emphasis and scope, about two-thirds of the 75 staff journalists are based in the London borough of Westminster.
For the year to March 2016, the Economist Group declared operating profit of £61m. The Economist takes an editorial stance of classical and economic liberalism that supports free trade, free immigration and cultural liberalism; the publication has described itself as "a product of the Caledonian liberalism of Adam Smith and David Hume". It targets educated, cultured readers and claims an audience containing many influential executives and policy-makers; the publication's CEO described this recent global change, first noticed in the 1990s and accelerated in the beginning of the 21st century as a "new age of Mass Intelligence". The Economist was founded by the British businessman and banker James Wilson in 1843, to advance the repeal of the Corn Laws, a system of import tariffs. A prospectus for the "newspaper" from 5 August 1843 enumerated thirteen areas of coverage that its editors wanted the publication to focus on: Original leading articles, in which free-trade principles will be most rigidly applied to all the important questions of the day.
Articles relating to some practical, agricultural, or foreign topic of passing interest, such as foreign treaties. An article on the elementary principles of political economy, applied to practical experience, covering the laws related to prices, rent, exchange and taxes. Parliamentary reports, with particular focus on commerce and free trade. Reports and accounts of popular movements advocating free trade. General news from the Court of St. James's, the Metropolis, the Provinces and Ireland. Commercial topics such as changes in fiscal regulations, the state and prospects of the markets and exports, foreign news, the state of the manufacturing districts, notices of important new mechanical improvements, shipping news, the money market, the progress of railways and public companies. Agricultural topics, including the application of geology and chemistry. Colonial and foreign topics, including trade, produce and fiscal changes, other matters, including exposés on the evils of restriction and protection, the advantages of free intercourse and trade.
Law reports, confined chiefly to areas important to commerce and agriculture. Books, confined chiefly, but not so to commerce and agriculture, including all treatises on political economy, finance, or taxation. A commercial gazette, with prices and statistics of the week. Correspondence and inquiries from the news magazine's readers. Wilson described it as taking part in "a severe contest between intelligence, which presses forward, an unworthy, timid ignorance obstructing our progress", a phrase which still appears on its masthead as the publication's mission, it has long been respected as "one of the most competent and subtle Western periodicals on public affairs". The publication was a major source of financial and economic information for Karl Marx in the formulation of socialist theory. In January 2012, The Economist launched a new weekly section devoted to China, the first new country section since the introduction of a section about the United States in 1942. In August 2015, The Economist Group bought back 5 million of its shares from Pearson.
Pearson's remaining shares would be sold to Exor. The editors of The Economist have been: James Wilson 1843–1857 Richard Holt Hutton 1857–1861 Walter Bagehot, 1861–1877 Daniel Conner Lathbury, 1877–1881 Robert Harry Inglis Palgrave, 1877–1883 Edward Johnstone, 1883–1907 Francis Wrigley Hirst, 1907–1916 Hartley Withers, 1916–1921 Sir Walter Layton, 1922–1938 Geoffrey Crowther, 1938–1956 Donald Tyerman, 1956–1965 Sir Alastair Burnet, 1965–1974 Andrew Knight, 1974–1986 Rupert Pennant-Rea, 1986–1993 Bill Emmott, 1993–2006 John Micklethwait, 2006–2014 Zanny Minton Beddoes, 2015–present When the news magazine was founded, the term "economism" denoted what would today be termed "economic liberalism"; the Economist supports free trade and free immigration. The activist and journalist George Monbiot has described it as neo-liberal while accepti
United States dollar
The United States dollar is the official currency of the United States and its territories per the United States Constitution since 1792. In practice, the dollar is divided into 100 smaller cent units, but is divided into 1000 mills for accounting; the circulating paper money consists of Federal Reserve Notes that are denominated in United States dollars. Since the suspension in 1971 of convertibility of paper U. S. currency into any precious metal, the U. S. dollar is, de facto, fiat money. As it is the most used in international transactions, the U. S. dollar is the world's primary reserve currency. Several countries use it as their official currency, in many others it is the de facto currency. Besides the United States, it is used as the sole currency in two British Overseas Territories in the Caribbean: the British Virgin Islands and Turks and Caicos Islands. A few countries use the Federal Reserve Notes for paper money, while still minting their own coins, or accept U. S. dollar coins. As of June 27, 2018, there are $1.67 trillion in circulation, of which $1.62 trillion is in Federal Reserve notes.
Article I, Section 8 of the U. S. Constitution provides that the Congress has the power "To coin money". Laws implementing this power are codified at 31 U. S. C. § 5112. Section 5112 prescribes the forms; these coins are both designated in Section 5112 as "legal tender" in payment of debts. The Sacagawea dollar is one example of the copper alloy dollar; the pure silver dollar is known as the American Silver Eagle. Section 5112 provides for the minting and issuance of other coins, which have values ranging from one cent to 100 dollars; these other coins are more described in Coins of the United States dollar. The Constitution provides that "a regular Statement and Account of the Receipts and Expenditures of all public Money shall be published from time to time"; that provision of the Constitution is made specific by Section 331 of Title 31 of the United States Code. The sums of money reported in the "Statements" are being expressed in U. S. dollars. The U. S. dollar may therefore be described as the unit of account of the United States.
The word "dollar" is one of the words in the first paragraph of Section 9 of Article I of the Constitution. There, "dollars" is a reference to the Spanish milled dollar, a coin that had a monetary value of 8 Spanish units of currency, or reales. In 1792 the U. S. Congress passed a Coinage Act. Section 9 of that act authorized the production of various coins, including "DOLLARS OR UNITS—each to be of the value of a Spanish milled dollar as the same is now current, to contain three hundred and seventy-one grains and four sixteenth parts of a grain of pure, or four hundred and sixteen grains of standard silver". Section 20 of the act provided, "That the money of account of the United States shall be expressed in dollars, or units... and that all accounts in the public offices and all proceedings in the courts of the United States shall be kept and had in conformity to this regulation". In other words, this act designated the United States dollar as the unit of currency of the United States. Unlike the Spanish milled dollar, the U.
S. dollar is based upon a decimal system of values. In addition to the dollar the coinage act established monetary units of mill or one-thousandth of a dollar, cent or one-hundredth of a dollar, dime or one-tenth of a dollar, eagle or ten dollars, with prescribed weights and composition of gold, silver, or copper for each, it was proposed in the mid-1800s that one hundred dollars be known as a union, but no union coins were struck and only patterns for the $50 half union exist. However, only cents are in everyday use as divisions of the dollar. XX9 per gallon, e.g. $3.599, more written as $3.599⁄10. When issued in circulating form, denominations equal to or less than a dollar are emitted as U. S. coins while denominations equal to or greater than a dollar are emitted as Federal Reserve notes. Both one-dollar coins and notes are produced today, although the note form is more common. In the past, "paper money" was issued in denominations less than a dollar and gold coins were issued for circulation up to the value of $20.
The term eagle was used in the Coinage Act of 1792 for the denomination of ten dollars, subsequently was used in naming gold coins. Paper currency less than one dollar in denomination, known as "fractional currency", was sometimes pejoratively referred to as "shinplasters". In 1854, James Guthrie Secretary of the Treasury, proposed creating $100, $50 and $25 gold coins, which were referred to as a "Union", "Half Union", "Quarter Union", thus implying a denomination of 1 Union = $100. Today, USD notes are made from cotton fiber paper, unlike most common paper, made of wood fiber. U. S. coins are produced by the United States Mint. U. S. dollar banknotes are printed by the Bureau of Engraving and Printing and, since 1914, have been issued by t
The World Bank is an international financial institution that provides loans to countries of the world for capital projects. It comprises two institutions: the International Bank for Reconstruction and Development, the International Development Association; the World Bank is a component of the World Bank Group. The World Bank's most recent stated goal is the reduction of poverty; as of November 2018, the largest recipients of world bank loans were India and China, through loans from IBRD. The World Bank is different from the World Bank Group, an extended family of five international organizations: International Bank for Reconstruction and Development International Development Association International Finance Corporation Multilateral Investment Guarantee Agency International Centre for Settlement of Investment Disputes The World Bank was created at the 1944 Bretton Woods Conference along with the International Monetary Fund; the president of the World Bank is, traditionally, an American. The World Bank and the IMF are both based in Washington, D.
C. and work with each other. Although many countries were represented at the Bretton Woods Conference, the United States and United Kingdom were the most powerful in attendance and dominated the negotiations; the intention behind the founding of the World Bank was to provide temporary loans to low-income countries which were unable to obtain loans commercially. The Bank may make loans and demand policy reforms from recipients. Before 1974, the reconstruction and development loans provided by the World Bank were small; the Bank's staff were aware of the need to instill confidence in the bank. Fiscal conservatism ruled, loan applications had to meet strict criteria; the first country to receive a World Bank loan was France. The Bank's president at the time, John McCloy, chose France over two other applicants and Chile; the loan was for US$250 million, half the amount requested, it came with strict conditions. France had to agree to produce a balanced budget and give priority of debt repayment to the World Bank over other governments.
World Bank staff monitored the use of the funds to ensure that the French government met the conditions. In addition, before the loan was approved, the United States State Department told the French government that its members associated with the Communist Party would first have to be removed; the French government complied and removed the Communist coalition government - the so-called tripartite. Within hours, the loan to France was approved; when the Marshall Plan went into effect in 1947, many European countries began receiving aid from other sources. Faced with this competition, the World Bank shifted its focus to non-European countries; until 1968, its loans were earmarked for the construction of infrastructure works, such as seaports, highway systems, power plants, that would generate enough income to enable a borrower country to repay the loan. In 1960, the International Development Association was formed, providing soft loans to developing countries. From 1974 to 1980 the bank concentrated on meeting the basic needs of people in the developing world.
The size and number of loans to borrowers was increased as loan targets expanded from infrastructure into social services and other sectors. These changes can be attributed to Robert McNamara, appointed to the presidency in 1968 by Lyndon B. Johnson. McNamara implored bank treasurer Eugene Rotberg to seek out new sources of capital outside of the northern banks, the primary sources of funding. Rotberg used the global bond market to increase the capital available to the bank. One consequence of the period of poverty alleviation lending was the rapid rise of third world debt. From 1976 to 1980 developing world debt rose at an average annual rate of 20%. In 1980 the World Bank Administrative Tribunal was established to decide on disputes between the World Bank Group and its staff where allegation of non-observance of contracts of employment or terms of appointment had not been honored. In 1980 McNamara was succeeded by Alden W. Clausen. Clausen crafted a different mission emphasis, his 1982 decision to replace the bank's Chief Economist, Hollis B.
Chenery, with Anne Krueger was an example of this new focus. Krueger was known for her criticism of development funding and for describing Third World governments as "rent-seeking states". During the 1980s the bank emphasized lending to service Third-World debt, structural adjustment policies designed to streamline the economies of developing nations. UNICEF reported in the late 1980s that the structural adjustment programs of the World Bank had been responsible for "reduced health and educational levels for tens of millions of children in Asia, Latin America, Africa". Beginning in 1989, in response to harsh criticism from many groups, the bank began including environmental groups and NGOs in its loans to mitigate the past effects of its development policies that had prompted the criticism, it formed an implementing agency, in accordance with the Montreal Protocols, to stop ozone-depletion damage to the Earth's atmosphere by phasing out the use of 95% of ozone-depleting chemicals, with a target date of 2015.
Since in accordance with its so-called "Six Strategic Themes", the bank has put various additional policies into effect to preserve the environment while promoting development. For example, in 1991 the bank announced that to protect against deforestation in the Amazon, it would not finance any commercial logging or infrastructure projects that harm the en
Kyrgyzstan the Kyrgyz Republic, known as Kirghizia, is a country in Central Asia. Kyrgyzstan is a landlocked country with mountainous terrain, it is bordered by Kazakhstan to the north, Uzbekistan to the west and southwest, Tajikistan to the southwest and China to the east. Its capital and largest city is Bishkek. Kyrgyzstan's recorded history spans over 2,000 years, encompassing a variety of cultures and empires. Although geographically isolated by its mountainous terrain, which has helped preserve its ancient culture, Kyrgyzstan has been at the crossroads of several great civilizations as part of the Silk Road and other commercial and cultural routes. Though long inhabited by a succession of independent tribes and clans, Kyrgyzstan has periodically fallen under foreign domination and attained sovereignty as a nation-state only after the breakup of the Soviet Union in 1991. Since independence, the sovereign state has been a unitary parliamentary republic, although it continues to endure ethnic conflicts, economic troubles, transitional governments and political conflict.
Kyrgyzstan is a member of the Commonwealth of Independent States, the Eurasian Economic Union, the Collective Security Treaty Organization, the Shanghai Cooperation Organisation, the Organisation of Islamic Cooperation, the Turkic Council, the Türksoy community and the United Nations. Ethnic Kyrgyz make up the majority of the country's 6 million people, followed by significant minorities of Uzbeks and Russians. Kyrgyz is related to other Turkic languages, although Russian remains spoken and is an official language, a legacy of a century of Russification; the majority of the population are non-denominational Muslims. In addition to its Turkic origins, Kyrgyz culture bears elements of Persian and Russian influence. "Kyrgyz" is believed to have been derived from the Turkic word for "forty", in reference to the forty clans of Manas, a legendary hero who united forty regional clans against the Uyghurs. Kyrgyz means We are forty. At the time, in the early 9th century AD, the Uyghurs dominated much of Central Asia and parts of Russia and China.
The 40-ray sun on the flag of Kyrgyzstan is a reference to those same forty tribes and the graphical element in the sun's center depicts the wooden crown, called tunduk, of a yurt—a portable dwelling traditionally used by nomads in the steppes of Central Asia. In terms of naming conventions, the country's official name is "Kyrgyz Republic" whenever it is used in some international arenas and foreign relations. However, in the English-speaking world, the spelling Kyrgyzstan is used while its former name Kirghizia is used as such. According to David C. King, Scythians were early settlers in present-day Kyrgyzstan; the Kyrgyz state reached its greatest expansion after defeating the Uyghur Khaganate in 840 A. D. From the 10th century the Kyrgyz migrated as far as the Tian Shan range and maintained their dominance over this territory for about 200 years. In the twelfth century the Kyrgyz dominion had shrunk to the Altay Range and Sayan Mountains as a result of the Mongol expansion. With the rise of the Mongol Empire in the thirteenth century, the Kyrgyz migrated south.
The Kyrgyz peacefully became a part of the Mongol Empire in 1207. The descent of the Kyrgyz from the indigenous Siberian population, on the other hand, is confirmed by recent genetic studies; because of the processes of migration, conquest and assimilation, many of the Kyrgyz peoples who now inhabit Central and Southwest Asia are of mixed origins stemming from fragments of many different tribes, though they now speak related languages. Issyk Kul Lake was a stopover on the Silk Road, a land route for traders and other travelers from the Far East to Europe. Kyrgyz tribes were overrun in the 17th century by the Mongols, in the mid-18th century by the Manchurian Qing Dynasty, in the early 19th century by the Uzbek Khanate of Kokand. In the late nineteenth century, the eastern part of what is today Kyrgyzstan the Issyk-Kul Region, was ceded to the Russian Empire by Qing China through the Treaty of Tarbagatai; the territory known in Russian as "Kirghizia", was formally incorporated into the Empire in 1876.
The Russian takeover was met with numerous revolts, many of the Kyrgyz opted to relocate to the Pamir Mountains and Afghanistan. In addition, the suppression of the 1916 rebellion against Russian rule in Central Asia caused many Kyrgyz to migrate to China. Since many ethnic groups in the region were split between neighboring states at a time when borders were more porous and less regulated, it was common to move back and forth over the mountains, depending on where life was perceived as better. Soviet power was established in the region in 1919, the Kara-Kyrgyz Autonomous Oblast was created within the Russian SFSR. On 5 December 1936, the Kirghiz Soviet Socialist Republic was established as a constituent Union Republic of the Soviet Union. During the 1920s, Kyrgyzstan developed in cultural and social life. Literacy was improved, a standard literary language was introduced by imposing Russian on the populace. Economic and social development was notable. Many aspects of the Ky
Jalal-Abad Region known as Jalalabat, is a region of Kyrgyzstan. Its capital is the city of Jalal-Abad, it is surrounded by Talas Region, Chuy Region, Naryn Region, Osh Region, Uzbekistan. Jalal-Abad Region was established on 21 November 1939. On 27 January 1959 it became a part of Osh Region, but regained its old status as a region on 14 December 1990. Jalal-Abad Region consist of 8 districts, includes 5 towns, 8 urba-type settlements, 415 villages Jalalabad oblast covers 33,647 square kilometres in central-western Kyrgyzstan; the southern edge of the region is part of the Ferghana Valley. The rest of the region is mountainous. M41, the main north-south highway from Bishkek to Osh, takes a crooked route down the center of the region. Another road follows the south border to the western tip and turns northeast up the Chatkal valley to Kyzyl-Adyr in Talas Region. Another road goes east to Naryn. An integral part of the country's power system is Toktogul hydroelectric power station, which supplies electricity and water to both Kyrgyzstan and neighboring countries.
The area has several mountain lakes, walnut forests, mineral waters. It has the world's largest natural growing walnut forest, called Arslanbob, about 40 kilometres north of Jalal-Abad city. Jalal-Abad Region is rich in ecological resources. Among protected areas located in the region are Sary-Chelek State Biosphere Nature Reserve, Besh-Aral State Nature Reserve, Padyshata State Nature Reserve. There is State Nature National Park Saimaluu-Tash located in Toguz-Toro District. Natural monuments include: Tegerek Waterfall located in the upper reaches of Kara-Unkur River, Sogon-Tash Cave, composed of red sandstone Kara-Jygach Rocks in Aksy District. Among other protected areas are: Forest reserves Botanical reserves Game reserves Employed population: 390,700 Registered Unemployed Population: 18,707 Export: 87.1 million US dollars Import: 111.5 million US dollars Direct Foreign Investments: 16.8 million US dollars Wheat, vegetables, nuts and silk-worm cocoons are grown in the region. The region has a few textile plants and hydroelectric stations.
Minerals, natural gas, coal and oil can be found here, notably around the town of Kochkor-Ata, home to small scale oil industry. Most of the extraction of minerals, natural gas, coal and oil of the Soviet era has ceased. A pearl of the region is the Sary-Chelek Nature Reserve with Lake Sary-Chelek, surrounded by wild fruit orchards and snow-covered peaks. A few Soviet-era resorts offer mineral water treatment programs for people with various chronic diseases. A number of companies have succeeded in trading bottled mineral water around the country and abroad. Except for the small fringes of the Fergana Valley, Jalal-Abad Region is a land of mountains. There are unlimited trekking possibilities in the area, but the lack of infrastructure, except at Arslanbob, poses problems to visitors. Jalal-Abad is divided administratively into 8 districts: As of 2009, Jalal-Abad Region comprised 7 towns, 7 urban-type settlements, 3 settlements, 420 villages, its population, according to the Population and Housing Census of 2009 amounted to 930,630 or 1,009,889.
According to the 2009 Census, the ethnic composition of Jalal-Abad Region was
Dissolution of the Soviet Union
The dissolution of the Soviet Union occurred on 26 December 1991 granting self-governing independence to the Republics of the Union of Soviet Socialist Republics. It was a result of the declaration number 142-Н of the Supreme Soviet of the Soviet Union; the declaration acknowledged the independence of the former Soviet republics and created the Commonwealth of Independent States, although five of the signatories ratified it much or did not do so at all. On the previous day, 25 December, Soviet President Mikhail Gorbachev, the eighth and final leader of the USSR, declared his office extinct and handed over its powers—including control of the Soviet nuclear missile launching codes—to Russian President Boris Yeltsin; that evening at 7:32 p.m. the Soviet flag was lowered from the Kremlin for the last time and replaced with the pre-revolutionary Russian flag. From August to December all the individual republics, including Russia itself, had either seceded from the union or at the least denounced the Treaty on the Creation of the USSR.
The week before formal dissolution, eleven republics signed the Alma-Ata Protocol formally establishing the CIS and declaring that the USSR had ceased to exist. Both the Revolutions of 1989 and the dissolution of the USSR marked the end of the Cold War. Several of the former Soviet republics have retained close links with the Russian Federation and formed multilateral organizations such as the Commonwealth of Independent States, Eurasian Economic Community, the Union State, the Eurasian Customs Union and the Eurasian Economic Union to enhance economic and security cooperation. On the other hand, the Baltic states have joined the European Union. Mikhail Gorbachev was elected General Secretary by the Politburo on March 11, 1985, three hours after predecessor Konstantin Chernenko's death at age 73. Gorbachev, aged 54, was the youngest member of the Politburo, his initial goal as general secretary was to revive the Soviet economy, he realized that doing so would require reforming underlying political and social structures.
The reforms began with personnel changes of senior Brezhnev-era officials who would impede political and economic change. On April 23, 1985, Gorbachev brought two protégés, Yegor Ligachev and Nikolai Ryzhkov, into the Politburo as full members, he kept the "power" ministries happy by promoting KGB Head Viktor Chebrikov from candidate to full member and appointing Minister of Defence Marshal Sergei Sokolov as a Politburo candidate. This liberalization, fostered nationalist movements and ethnic disputes within the Soviet Union, it led indirectly to the revolutions of 1989, in which Soviet-imposed socialist regimes of the Warsaw Pact were toppled peacefully, which in turn increased pressure on Gorbachev to introduce greater democracy and autonomy for the Soviet Union's constituent republics. Under Gorbachev's leadership, the Communist Party of the Soviet Union in 1989 introduced limited competitive elections to a new central legislature, the Congress of People's Deputies. In May 1985, Gorbachev delivered a speech in Leningrad advocating reforms and an anti-alcohol campaign to tackle widespread alcoholism.
Prices of vodka and beer were raised, intended to discourage drinking by increasing the cost of liquor. A rationing program was introduced, where citizens were assigned punch cards detailing how much liquor they could buy in a certain time frame. Unlike most forms of rationing, adopted as a strategy to conserve scarce goods, this was done to restrict sales with the overt goal of curtailing drunkenness. Gorbachev's plan included billboards promoting sobriety, increased penalties for public drunkenness, censorship of drinking scenes from old movies; this mirrored Tsar Nicholas II's program during the First World War, intended to eradicate drunkenness in order to bolster the war effort. However, that earlier effort was intended to preserve grain for only the most essential purposes, which did not appear to be a goal in Gorbachev's program. Gorbachev soon faced the same adverse economic reaction to his prohibition; the disincentivization of alcohol consumption was a serious blow to the state budget according to Alexander Yakovlev, who noted annual collections of alcohol taxes decreased by 100 billion rubles.
Alcohol sales migrated to the black market and moonshining became more prevalent as some made "bathtub vodka" with homegrown potatoes. Poorer, less educated Soviets resorted to drinking unhealthy substitutes such as nail-polish remover, rubbing alcohol, or men's cologne, resulting in an additional burden on Russia's healthcare sector due to the increased poisoning cases; the underlying purpose of these reforms was to prop up the existing command economy, in contrast to reforms, which tended toward market socialism. On July 1, 1985, Gorbachev promoted Eduard Shevardnadze, First Secretary of the Georgian Communist Party, to full member of the Politburo, the following day appointed him minister of foreign affairs, replacing longtime Foreign Minister Andrei Gromyko; the latter, disparaged as "Mr Nyet" in the West, had served for 28 years as Minister of Foreign Affairs. Gromyko was relegated to the ceremonial position of Chairman of the Presidium of the Supreme Soviet, as he was considered an "old thinker".
On July 1, Gorbachev sidelined his main rival by removing Grigory Romanov from the Politburo and he brought Boris Yeltsin and Lev Zaikov into the CPSU Central Committee Secretariat. In the fall of 1985, Gorbachev continued to bring more energetic men into government. On September 27, 55-year-ol
Tectonics is the process that controls the structure and properties of the Earth's crust and its evolution through time. In particular, it describes the processes of mountain building, the growth and behavior of the strong, old cores of continents known as cratons, the ways in which the rigid plates that constitute the Earth's outer shell interact with each other. Tectonics provides a framework for understanding the earthquake and volcanic belts that directly affect much of the global population. Tectonic studies are important as guides for economic geologists searching for fossil fuels and ore deposits of metallic and nonmetallic resources. An understanding of tectonic principles is essential to geomorphologists to explain erosion patterns and other Earth surface features. Extensional tectonics is associated with the stretching and thinning of the crust or the lithosphere; this type of tectonics is found at divergent plate boundaries, in continental rifts and after a period of continental collision caused by the lateral spreading of the thickened crust formed, at releasing bends in strike-slip faults, in back-arc basins, on the continental end of passive margin sequences where a detachment layer is present.
Thrust tectonics is associated with the lithosphere. This type of tectonics is found at zones of continental collision, at restraining bends in strike-slip faults, at the oceanward part of passive margin sequences where a detachment layer is present. Strike-slip tectonics is associated with the relative lateral movement of parts of the crust or the lithosphere; this type of tectonics is found along oceanic and continental transform faults which connect offset segments of mid-ocean ridges. Strike-slip tectonics occurs at lateral offsets in extensional and thrust fault systems. In areas involved with plate collisions strike-slip deformation occurs in the over-riding plate in zones of oblique collision and accommodates deformation in the foreland to a collisional belt. In plate tectonics the outermost part of the Earth – the crust and uppermost mantle – are viewed as acting as a single mechanical layer, the lithosphere; the lithosphere is divided into separate "plates" that move relative to each other on the underlying weak asthenosphere in a process driven by the continuous loss of heat from the Earth's interior.
There are three main types of plate boundaries: divergent, where plates move apart from each other and new lithosphere is formed in the process of sea-floor spreading. Convergent and transform boundaries form the largest structural discontinuities in the lithosphere and are responsible for most of the world's major earthquakes. Convergent and divergent boundaries are the site of most of the world's volcanoes, such as around the Pacific Ring of Fire. Most of the deformation in the lithosphere is related to the interaction between plates, either directly or indirectly. Salt tectonics is concerned with the structural geometries and deformation processes associated with the presence of significant thicknesses of rock salt within a sequence of rocks; this is due both to the low density of salt, which does not increase with burial, its low strength. Neotectonics is the study of the motions and deformations of the Earth's crust that are current or recent in geological time; the term may refer to the motions and deformations themselves.
The corresponding time frame is referred to as the neotectonic period. Accordingly, the preceding time is referred to as palaeotectonic period. Tectonophysics is the study of the physical processes associated with deformation of the crust and mantle from the scale of individual mineral grains up to that of tectonic plates. Seismotectonics is the study of the relationship between earthquakes, active tectonics, individual faults in a region, it seeks to understand which faults are responsible for seismic activity in an area by analysing a combination of regional tectonics, recent instrumentally recorded events, accounts of historical earthquakes, geomorphological evidence. This information can be used to quantify the seismic hazard of an area. Techniques used in the analysis of tectonics on Earth have been applied to the study of the planets and their moons. Tectonophysics Seismology UNESCO world heritage site Glarus Thrust Volcanology Edward A. Keller Active Tectonics: Earthquakes and Landscape Prentice Hall.
A. van der S. Marshak. Earth Structure – An Introduction to Structural Geology and Tectonics. 2nd edition. New York: W. W. Norton. P. 656. ISBN 0-393-92467-X; the Origin and the Mechanics of the Forces Responsible for Tectonic Plate Movements The Paleomap Project