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Jonas Bronck (c. 1600–43) was a Swedish born emigrant from Komstad, Norra Ljunga parish in Småland, Sweden who arrived in New Netherland during the spring of 1639. He became the first recorded European settler in the area now known as the Bronx. He leased land from the Dutch West India Company on the neck of the mainla...
The Bronx is referred to, both legally and colloquially, with a definite article, as the Bronx. (The County of Bronx, unlike the coextensive Borough of the Bronx, does not place the immediately before Bronx in formal references, nor does the United States Postal Service in its database of Bronx addresses.) The name for...
The development of the Bronx is directly connected to its strategic location between New England and New York (Manhattan). Control over the bridges across the Harlem River plagued the period of British colonial rule. Kingsbridge, built in 1693 where Broadway reached the Spuyten Duyvil Creek, was a possession of Frederi...
The territory now contained within Bronx County was originally part of Westchester County, one of the 12 original counties of the English Province of New York. The present Bronx County was contained in the town of Westchester and parts of the towns of Yonkers, Eastchester, and Pelham. In 1846, a new town, West Farms, w...
The consolidation of the Bronx into New York City proceeded in two stages. In 1873, the state legislature annexed Kingsbridge, West Farms and Morrisania to New York, effective in 1874; the three towns were abolished in the process. In 1895, three years before New York's consolidation with Brooklyn, Queens and Staten Is...
The history of the Bronx during the 20th century may be divided into four periods: a boom period during 1900–29, with a population growth by a factor of six from 200,000 in 1900 to 1.3 million in 1930. The Great Depression and post World War II years saw a slowing of growth leading into an eventual decline. The mid to ...
The Bronx underwent rapid urban growth after World War I. Extensions of the New York City Subway contributed to the increase in population as thousands of immigrants came to the Bronx, resulting in a major boom in residential construction. Among these groups, many Irish Americans, Italian Americans and especially Jewis...
Yet another may have been a reduction in the real-estate listings and property-related financial services (such as mortgage loans or insurance policies) offered in some areas of the Bronx — a process known as redlining. Others have suggested a "planned shrinkage" of municipal services, such as fire-fighting. There was ...
In the 1970s, the Bronx was plagued by a wave of arson. The burning of buildings was predominantly in the poorest communities, like the South Bronx. The most common explanation of what occurred was that landlords decided to burn their low property-value buildings and take the insurance money as it was more lucrative to...
Since the late 1980s, significant development has occurred in the Bronx, first stimulated by the city's "Ten-Year Housing Plan" and community members working to rebuild the social, economic and environmental infrastructure by creating affordable housing. Groups affiliated with churches in the South Bronx erected the Ne...
In 1997, the Bronx was designated an All America City by the National Civic League, acknowledging its comeback from the decline of the mid-century. In 2006, The New York Times reported that "construction cranes have become the borough's new visual metaphor, replacing the window decals of the 1980s in which pictures of ...
Several boutique and chain hotels have opened in recent years in the South Bronx; in addition, a La Quinta Inn that has been proposed for the Mott Haven waterfront. The Kingsbridge Armory, often cited as the largest armory in the world, is scheduled for redevelopment as the Kingsbridge National Ice Center. Under consid...
The Bronx is almost entirely situated on the North American mainland. The Hudson River separates the Bronx on the west from Alpine, Tenafly and Englewood Cliffs in Bergen County, New Jersey; the Harlem River separates it from the island of Manhattan to the southwest; the East River separates it from Queens to the south...
The Bronx's highest elevation at 280 feet (85 m) is in the northwest corner, west of Van Cortlandt Park and in the Chapel Farm area near the Riverdale Country School. The opposite (southeastern) side of the Bronx has four large low peninsulas or "necks" of low-lying land that jut into the waters of the East River and w...
The northern side of the borough includes the largest park in New York City—Pelham Bay Park, which includes Orchard Beach—and the fourth largest, Van Cortlandt Park, which is west of Woodlawn Cemetery and borders Yonkers. Also in the northern Bronx, Wave Hill, the former estate of George W. Perkins—known for a historic...
East of the Bronx River, the borough is relatively flat and includes four large low peninsulas, or 'necks,' of low-lying land which jut into the waters of the East River and were once saltmarsh: Hunts Point, Clason's Point, Screvin's Neck (Castle Hill Point) and Throgs Neck. The East Bronx has older tenement buildings,...
The western parts of the Bronx are hillier and are dominated by a series of parallel ridges, running south to north. The West Bronx has older apartment buildings, low income public housing complexes, multifamily homes in its lower income areas as well as larger single family homes in more affluent areas such as Riverda...
Like other neighborhoods in New York City, the South Bronx has no official boundaries. The name has been used to represent poverty in the Bronx and applied to progressively more northern places so that by the 2000s Fordham Road was often used as a northern limit. The Bronx River more consistently forms an eastern bound...
There are three primary shopping centers in the Bronx: The Hub, Gateway Center and Southern Boulevard. The Hub–Third Avenue Business Improvement District (B.I.D.), in The Hub, is the retail heart of the South Bronx, located where four roads converge: East 149th Street, Willis, Melrose and Third Avenues. It is primarily...
The Gateway Center at Bronx Terminal Market, in the West Bronx, is a shopping center that encompasses less than one million square feet of retail space, built on a 17 acres (7 ha) site that formerly held the Bronx Terminal Market, a wholesale fruit and vegetable market as well as the former Bronx House of Detention, so...
The Bronx street grid is irregular. Like the northernmost part of upper Manhattan, the West Bronx's hilly terrain leaves a relatively free-style street grid. Much of the West Bronx's street numbering carries over from upper Manhattan, but does not match it exactly; East 132nd Street is the lowest numbered street in the...
According to the 2010 Census, 53.5% of Bronx's population was of Hispanic, Latino, or Spanish origin (they may be of any race); 30.1% non-Hispanic Black or African American, 10.9% of the population was non-Hispanic White, 3.4% non-Hispanic Asian, 0.6% from some other race (non-Hispanic) and 1.2% of two or more races (n...
As of 2010, 46.29% (584,463) of Bronx residents aged five and older spoke Spanish at home, while 44.02% (555,767) spoke English, 2.48% (31,361) African languages, 0.91% (11,455) French, 0.90% (11,355) Italian, 0.87% (10,946) various Indic languages, 0.70% (8,836) other Indo-European languages, and Chinese was spoken at...
According to the 2009 American Community Survey, White Americans of both Hispanic and non-Hispanic origin represented over one-fifth (22.9%) of the Bronx's population. However, non-Hispanic whites formed under one-eighth (12.1%) of the population, down from 34.4% in 1980. Out of all five boroughs, the Bronx has the low...
At the 2009 American Community Survey, Black Americans made the second largest group in the Bronx after Hispanics and Latinos. Blacks of both Hispanic and non-Hispanic origin represented over one-third (35.4%) of the Bronx's population. Blacks of non-Hispanic origin made up 30.8% of the population. Over 495,200 blacks ...
In 2009, Hispanic and Latino Americans represented 52.0% of the Bronx's population. Puerto Ricans represented 23.2% of the borough's population. Over 72,500 Mexicans lived in the Bronx, and they formed 5.2% of the population. Cubans numbered over 9,640 members and formed 0.7% of the population. In addition, over 319,00...
Multiracial Americans are also a sizable minority in the Bronx. People of multiracial heritage number over 41,800 individuals and represent 3.0% of the population. People of mixed Caucasian and African American heritage number over 6,850 members and form 0.5% of the population. People of mixed Caucasian and Native Amer...
The office of Borough President was created in the consolidation of 1898 to balance centralization with local authority. Each borough president had a powerful administrative role derived from having a vote on the New York City Board of Estimate, which was responsible for creating and approving the city's budget and pro...
Until March 1, 2009, the Borough President of the Bronx was Adolfo Carrión Jr., elected as a Democrat in 2001 and 2005 before retiring early to direct the White House Office of Urban Affairs Policy. His successor, Democratic New York State Assembly member Rubén Díaz, Jr., who won a special election on April 21, 2009 by...
In the Presidential primary elections of February 5, 2008, Sen. Clinton won 61.2% of the Bronx's 148,636 Democratic votes against 37.8% for Barack Obama and 1.0% for the other four candidates combined (John Edwards, Dennis Kucinich, Bill Richardson and Joe Biden). On the same day, John McCain won 54.4% of the borough's...
Since then, the Bronx has always supported the Democratic Party's nominee for President, starting with a vote of 2-1 for the unsuccessful Al Smith in 1928, followed by four 2-1 votes for the successful Franklin D. Roosevelt. (Both had been Governors of New York, but Republican former Gov. Thomas E. Dewey won only 28% o...
The Bronx has often shown striking differences from other boroughs in elections for Mayor. The only Republican to carry the Bronx since 1914 was Fiorello La Guardia in 1933, 1937 and 1941 (and in the latter two elections, only because his 30-32% vote on the American Labor Party line was added to 22-23% as a Republican)...
Education in the Bronx is provided by a large number of public and private institutions, many of which draw students who live beyond the Bronx. The New York City Department of Education manages public noncharter schools in the borough. In 2000, public schools enrolled nearly 280,000 of the Bronx's residents over 3 year...
Educational attainment: In 2000, according to the U.S. Census, out of the nearly 800,000 people in the Bronx who were then at least 25 years old, 62.3% had graduated from high school and 14.6% held a bachelor's or higher college degree. These percentages were lower than those for New York's other boroughs, which ranged...
Many public high schools are located in the borough including the elite Bronx High School of Science, Celia Cruz Bronx High School of Music, DeWitt Clinton High School, High School for Violin and Dance, Bronx Leadership Academy 2, Bronx International High School, the School for Excellence, the Morris Academy for Collab...
In the 1990s, New York City began closing the large, public high schools in the Bronx and replacing them with small high schools. Among the reasons cited for the changes were poor graduation rates and concerns about safety. Schools that have been closed or reduced in size include John F. Kennedy, James Monroe, Taft, Th...
The Bronx's evolution from a hot bed of Latin jazz to an incubator of hip hop was the subject of an award-winning documentary, produced by City Lore and broadcast on PBS in 2006, "From Mambo to Hip Hop: A South Bronx Tale". Hip Hop first emerged in the South Bronx in the early 1970s. The New York Times has identified 1...
Beginning with the advent of beat match DJing, in which Bronx DJs (Disc Jockeys) including Grandmaster Flash, Afrika Bambaataa and DJ Kool Herc extended the breaks of funk records, a major new musical genre emerged that sought to isolate the percussion breaks of hit funk, disco and soul songs. As hip hop's popularity g...
The Bronx is the home of the New York Yankees of Major League Baseball. The original Yankee Stadium opened in 1923 on 161st Street and River Avenue, a year that saw the Yankees bring home their first of 27 World Series Championships. With the famous facade, the short right field porch and Monument Park, Yankee Stadium ...
The Bronx is home to several Off-Off-Broadway theaters, many staging new works by immigrant playwrights from Latin America and Africa. The Pregones Theater, which produces Latin American work, opened a new 130-seat theater in 2005 on Walton Avenue in the South Bronx. Some artists from elsewhere in New York City have be...
The Bronx Museum of the Arts, founded in 1971, exhibits 20th century and contemporary art through its central museum space and 11,000 square feet (1,000 m2) of galleries. Many of its exhibitions are on themes of special interest to the Bronx. Its permanent collection features more than 800 works of art, primarily by ar...
The Bronx has also become home to a peculiar poetic tribute, in the form of the Heinrich Heine Memorial, better known as the Lorelei Fountain from one of Heine's best-known works (1838). After Heine's German birthplace of Düsseldorf had rejected, allegedly for anti-Semitic motives, a centennial monument to the radical ...
In 1899, the memorial, by the Berlin sculptor Ernst Gustav Herter (1846–1917), finally came to rest, although subject to repeated vandalism, in the Bronx, at 164th Street and the Grand Concourse, or Joyce Kilmer Park near today's Yankee Stadium. (In 1999, it was moved to 161st Street and the Concourse.) In 2007, Christ...
The peninsular borough's maritime heritage is acknowledged in several ways.The City Island Historical Society and Nautical Museum occupies a former public school designed by the New York City school system's turn-of-the-last-century master architect C. B. J. Snyder. The state's Maritime College in Fort Schuyler (on the...
The Bronx has several local newspapers, including The Bronx News, Parkchester News, City News, The Riverdale Press, Riverdale Review, The Bronx Times Reporter, Inner City Press (which now has more of a focus on national issues) and Co-Op City Times. Four non-profit news outlets, Norwood News, Mount Hope Monitor, Mott H...
The City of New York has an official television station run by the NYC Media Group and broadcasting from Bronx Community College, and Cablevision operates News 12 The Bronx, both of which feature programming based in the Bronx. Co-op City was the first area in the Bronx, and the first in New York beyond Manhattan, to h...
Mid-20th century movies set in the Bronx portrayed densely settled, working-class, urban culture. Hollywood films such as From This Day Forward (1946), set in Highbridge, occasionally delved into Bronx life. Paddy Chayefsky's Academy Award-winning Marty was the most notable examination of working class Bronx life was a...
Starting in the 1970s, the Bronx often symbolized violence, decay, and urban ruin. The wave of arson in the South Bronx in the 1960s and 1970s inspired the observation that "The Bronx is burning": in 1974 it was the title of both a New York Times editorial and a BBC documentary film. The line entered the pop-consciousn...
Bronx gang life was depicted in the 1974 novel The Wanderers by Bronx native Richard Price and the 1979 movie of the same name. They are set in the heart of the Bronx, showing apartment life and the then-landmark Krums ice cream parlor. In the 1979 film The Warriors, the eponymous gang go to a meeting in Van Cortlandt ...
The 1981 film Fort Apache, The Bronx is another film that used the Bronx's gritty image for its storyline. The movie's title is from the nickname for the 41st Police Precinct in the South Bronx which was nicknamed "Fort Apache". Also from 1981 is the horror film Wolfen making use of the rubble of the Bronx as a home fo...
Bronx native Nancy Savoca's 1989 comedy, True Love, explores two Italian-American Bronx sweethearts in the days before their wedding. The film, which debuted Annabella Sciorra and Ron Eldard as the betrothed couple, won the Grand Jury Prize at that year's Sundance Film Festival. The CBS television sitcom Becker, 1998–2...
Penny Marshall's 1990 film Awakenings, which was nominated for several Oscars, is based on neurologist Oliver Sacks' 1973 account of his psychiatric patients at Beth Abraham Hospital in the Bronx who were paralyzed by a form of encephalitis but briefly responded to the drug L-dopa. Robin Williams played the physician; ...
The Bronx has been featured significantly in fiction literature. All of the characters in Herman Wouk's City Boy: The Adventures of Herbie Bookbinder (1948) live in the Bronx, and about half of the action is set there. Kate Simon's Bronx Primitive: Portraits of a Childhood is directly autobiographical, a warm account o...
By contrast, Tom Wolfe's Bonfire of the Vanities (1987) portrays a wealthy, white protagonist, Sherman McCoy, getting lost off the Major Deegan Expressway in the South Bronx and having an altercation with locals. A substantial piece of the last part of the book is set in the resulting riotous trial at the Bronx County ...
Humanism is a philosophical and ethical stance that emphasizes the value and agency of human beings, individually and collectively, and generally prefers critical thinking and evidence (rationalism, empiricism) over acceptance of dogma or superstition. The meaning of the term humanism has fluctuated according to the su...
Gellius says that in his day humanitas is commonly used as a synonym for philanthropy – or kindness and benevolence toward one's fellow human being. Gellius maintains that this common usage is wrong, and that model writers of Latin, such as Cicero and others, used the word only to mean what we might call "humane" or "p...
During the French Revolution, and soon after, in Germany (by the Left Hegelians), humanism began to refer to an ethical philosophy centered on humankind, without attention to the transcendent or supernatural. The designation Religious Humanism refers to organized groups that sprang up during the late-nineteenth and ear...
In 1808 Bavarian educational commissioner Friedrich Immanuel Niethammer coined the term Humanismus to describe the new classical curriculum he planned to offer in German secondary schools, and by 1836 the word "humanism" had been absorbed into the English language in this sense. The coinage gained universal acceptance ...
But in the mid-18th century, during the French Enlightenment, a more ideological use of the term had come into use. In 1765, the author of an anonymous article in a French Enlightenment periodical spoke of "The general love of humanity ... a virtue hitherto quite nameless among us, and which we will venture to call 'hu...
At about the same time, the word "humanism" as a philosophy centred on humankind (as opposed to institutionalised religion) was also being used in Germany by the so-called Left Hegelians, Arnold Ruge, and Karl Marx, who were critical of the close involvement of the church in the repressive German government. There has ...
Another instance of ancient humanism as an organised system of thought is found in the Gathas of Zarathustra, composed between 1,000 BCE – 600 BCE in Greater Iran. Zarathustra's philosophy in the Gathas lays out a conception of humankind as thinking beings dignified with choice and agency according to the intellect whi...
In China, Yellow Emperor is regarded as the humanistic primogenitor.[citation needed] Sage kings such as Yao and Shun are humanistic figures as recorded.[citation needed] King Wu of Zhou has the famous saying: "Humanity is the Ling (efficacious essence) of the world (among all)." Among them Duke of Zhou, respected as a...
In the 6th century BCE, Taoist teacher Lao Tzu espoused a series of naturalistic concepts with some elements of humanistic philosophy. The Silver Rule of Confucianism from Analects XV.24, is an example of ethical philosophy based on human values rather than the supernatural. Humanistic thought is also contained in othe...
6th-century BCE pre-Socratic Greek philosophers Thales of Miletus and Xenophanes of Colophon were the first in the region to attempt to explain the world in terms of human reason rather than myth and tradition, thus can be said to be the first Greek humanists. Thales questioned the notion of anthropomorphic gods and Xe...
Renaissance humanism was an intellectual movement in Europe of the later Middle Ages and the Early Modern period. The 19th-century German historian Georg Voigt (1827–91) identified Petrarch as the first Renaissance humanist. Paul Johnson agrees that Petrarch was "the first to put into words the notion that the centurie...
In the high Renaissance, in fact, there was a hope that more direct knowledge of the wisdom of antiquity, including the writings of the Church fathers, the earliest known Greek texts of the Christian Gospels, and in some cases even the Jewish Kabbalah, would initiate a harmonious new era of universal agreement. With th...
The humanists' close study of Latin literary texts soon enabled them to discern historical differences in the writing styles of different periods. By analogy with what they saw as decline of Latin, they applied the principle of ad fontes, or back to the sources, across broad areas of learning, seeking out manuscripts o...
After 1517, when the new invention of printing made these texts widely available, the Dutch humanist Erasmus, who had studied Greek at the Venetian printing house of Aldus Manutius, began a philological analysis of the Gospels in the spirit of Valla, comparing the Greek originals with their Latin translations with a vi...
The words of the comic playwright P. Terentius Afer reverberated across the Roman world of the mid-2nd century BCE and beyond. Terence, an African and a former slave, was well placed to preach the message of universalism, of the essential unity of the human race, that had come down in philosophical form from the Greeks...
Better acquaintance with Greek and Roman technical writings also influenced the development of European science (see the history of science in the Renaissance). This was despite what A. C. Crombie (viewing the Renaissance in the 19th-century manner as a chapter in the heroic March of Progress) calls "a backwards-lookin...
Just as artist and inventor Leonardo da Vinci – partaking of the zeitgeist though not himself a humanist – advocated study of human anatomy, nature, and weather to enrich Renaissance works of art, so Spanish-born humanist Juan Luis Vives (c. 1493–1540) advocated observation, craft, and practical techniques to improve t...
Early humanists saw no conflict between reason and their Christian faith (see Christian Humanism). They inveighed against the abuses of the Church, but not against the Church itself, much less against religion. For them, the word "secular" carried no connotations of disbelief – that would come later, in the nineteenth ...
Eliot and her circle, who included her companion George Henry Lewes (the biographer of Goethe) and the abolitionist and social theorist Harriet Martineau, were much influenced by the positivism of Auguste Comte, whom Martineau had translated. Comte had proposed an atheistic culte founded on human principles – a secular...
Active in the early 1920s, F.C.S. Schiller labelled his work "humanism" but for Schiller the term referred to the pragmatist philosophy he shared with William James. In 1929, Charles Francis Potter founded the First Humanist Society of New York whose advisory board included Julian Huxley, John Dewey, Albert Einstein an...
Humanistic psychology is a psychological perspective which rose to prominence in the mid-20th century in response to Sigmund Freud's psychoanalytic theory and B. F. Skinner's Behaviorism. The approach emphasizes an individual's inherent drive towards self-actualization and creativity. Psychologists Carl Rogers and Abra...
Raymond B. Bragg, the associate editor of The New Humanist, sought to consolidate the input of Leon Milton Birkhead, Charles Francis Potter, and several members of the Western Unitarian Conference. Bragg asked Roy Wood Sellars to draft a document based on this information which resulted in the publication of the Humani...
Renaissance humanism was an activity of cultural and educational reform engaged in by civic and ecclesiastical chancellors, book collectors, educators, and writers, who by the late fifteenth century began to be referred to as umanisti – "humanists". It developed during the fourteenth and the beginning of the fifteenth ...
Humanists reacted against this utilitarian approach and the narrow pedantry associated with it. They sought to create a citizenry (frequently including women) able to speak and write with eloquence and clarity and thus capable of engaging the civic life of their communities and persuading others to virtuous and prudent...
Contemporary humanism entails a qualified optimism about the capacity of people, but it does not involve believing that human nature is purely good or that all people can live up to the Humanist ideals without help. If anything, there is recognition that living up to one's potential is hard work and requires the help o...
Religious humanism is an integration of humanist ethical philosophy with religious rituals and beliefs that centre on human needs, interests, and abilities. Though practitioners of religious humanism did not officially organise under the name of "humanism" until the late 19th and early 20th centuries, non-theistic reli...
Polemics about humanism have sometimes assumed paradoxical twists and turns. Early 20th century critics such as Ezra Pound, T. E. Hulme, and T. S. Eliot considered humanism to be sentimental "slop" (Hulme)[citation needed] or "an old bitch gone in the teeth" (Pound) and wanted to go back to a more manly, authoritarian ...
In his book, Humanism (1997), Tony Davies calls these critics "humanist anti-humanists". Critics of antihumanism, most notably Jürgen Habermas, counter that while antihumanists may highlight humanism's failure to fulfil its emancipatory ideal, they do not offer an alternative emancipatory project of their own. Others, ...
The ad fontes principle also had many applications. The re-discovery of ancient manuscripts brought a more profound and accurate knowledge of ancient philosophical schools such as Epicureanism, and Neoplatonism, whose Pagan wisdom the humanists, like the Church fathers of old, tended, at least initially, to consider as...
Davies identifies Paine's The Age of Reason as "the link between the two major narratives of what Jean-François Lyotard calls the narrative of legitimation": the rationalism of the 18th-century Philosophes and the radical, historically based German 19th-century Biblical criticism of the Hegelians David Friedrich Straus...
Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as the result of a Mars-sized object with about 10% of the Eart...
Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as the result of a Mars-sized object with about 10% of the Eart...
The Earth of the early Archean (4,000 to 2,500 million years ago) may have had a different tectonic style. During this time, the Earth's crust cooled enough that rocks and continental plates began to form. Some scientists think because the Earth was hotter, that plate tectonic activity was more vigorous than it is toda...
In contrast to the Proterozoic, Archean rocks are often heavily metamorphized deep-water sediments, such as graywackes, mudstones, volcanic sediments and banded iron formations. Greenstone belts are typical Archean formations, consisting of alternating high- and low-grade metamorphic rocks. The high-grade rocks were de...
The geologic record of the Proterozoic (2,500 to 541 million years ago) is more complete than that for the preceding Archean. In contrast to the deep-water deposits of the Archean, the Proterozoic features many strata that were laid down in extensive shallow epicontinental seas; furthermore, many of these rocks are les...
The Paleozoic spanned from roughly 541 to 252 million years ago (Ma) and is subdivided into six geologic periods; from oldest to youngest they are the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. Geologically, the Paleozoic starts shortly after the breakup of a supercontinent called Pannotia and...
The Cambrian is a major division of the geologic timescale that begins about 541.0 ± 1.0 Ma. Cambrian continents are thought to have resulted from the breakup of a Neoproterozoic supercontinent called Pannotia. The waters of the Cambrian period appear to have been widespread and shallow. Continental drift rates may hav...
The Ordovician Period started at a major extinction event called the Cambrian-Ordovician extinction events some time about 485.4 ± 1.9 Ma. During the Ordovician the southern continents were collected into a single continent called Gondwana. Gondwana started the period in the equatorial latitudes and, as the period prog...
The most-commonly accepted theory is that these events were triggered by the onset of an ice age, in the Hirnantian faunal stage that ended the long, stable greenhouse conditions typical of the Ordovician. The ice age was probably not as long-lasting as once thought; study of oxygen isotopes in fossil brachiopods shows...
The Silurian is a major division of the geologic timescale that started about 443.8 ± 1.5 Ma. During the Silurian, Gondwana continued a slow southward drift to high southern latitudes, but there is evidence that the Silurian ice caps were less extensive than those of the late Ordovician glaciation. The melting of ice c...
The Devonian spanned roughly from 419 to 359 Ma. The period was a time of great tectonic activity, as Laurasia and Gondwana drew closer together. The continent Euramerica (or Laurussia) was created in the early Devonian by the collision of Laurentia and Baltica, which rotated into the natural dry zone along the Tropic ...
A global drop in sea level at the end of the Devonian reversed early in the Carboniferous; this created the widespread epicontinental seas and carbonate deposition of the Mississippian. There was also a drop in south polar temperatures; southern Gondwana was glaciated throughout the period, though it is uncertain if th...
The Carboniferous was a time of active mountain building, as the supercontinent Pangea came together. The southern continents remained tied together in the supercontinent Gondwana, which collided with North America-Europe (Laurussia) along the present line of eastern North America. This continental collision resulted i...
During the Permian all the Earth's major land masses, except portions of East Asia, were collected into a single supercontinent known as Pangaea. Pangaea straddled the equator and extended toward the poles, with a corresponding effect on ocean currents in the single great ocean (Panthalassa, the universal sea), and the...
The remainder was the world-ocean known as Panthalassa ("all the sea"). All the deep-ocean sediments laid down during the Triassic have disappeared through subduction of oceanic plates; thus, very little is known of the Triassic open ocean. The supercontinent Pangaea was rifting during the Triassic—especially late in t...
The Jurassic Period extends from about 201.3 ± 0.2 to 145.0 Ma. During the early Jurassic, the supercontinent Pangaea broke up into the northern supercontinent Laurasia and the southern supercontinent Gondwana; the Gulf of Mexico opened in the new rift between North America and what is now Mexico's Yucatan Peninsula. T...