Portal:Geography
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Geography (from Ancient Greek γεωγραφία geōgraphía; combining gê 'Earth' and gráphō 'write') is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science. Geography has been called "a bridge between natural science and social science disciplines."
Origins of many of the concepts in geography can be traced to Greek Eratosthenes of Cyrene, who may have coined the term "geographia" (c. 276 BC – c. 195/194 BC). The first recorded use of the word γεωγραφία was as the title of a book by Greek scholar Claudius Ptolemy (100 – 170 AD). This work created the so-called "Ptolemaic tradition" of geography, which included "Ptolemaic cartographic theory." However, the concepts of geography (such as cartography) date back to the earliest attempts to understand the world spatially, with the earliest example of an attempted world map dating to the 9th century BCE in ancient Babylon. The history of geography as a discipline spans cultures and millennia, being independently developed by multiple groups, and cross-pollinated by trade between these groups. The core concepts of geography consistent between all approaches are a focus on space, place, time, and scale.
Today, geography is an extremely broad discipline with multiple approaches and modalities. There have been multiple attempts to organize the discipline, including the four traditions of geography, and into branches. Techniques employed can generally be broken down into quantitative and qualitative approaches, with many studies taking mixed-methods approaches. Common techniques include cartography, remote sensing, interviews, and surveying. (Full article...)
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La Salle's Expedition to Louisiana in 1684, painted in 1844 by Theodore Gudin. La Belle is on the left, Le Joly is in the middle, and L'Aimable is grounded in the distance, right.
The French colonization of Texas began with the establishment of a fort in present-day southeastern Texas. Fort Saint Louis was established in 1685 near Arenosa Creek and Matagorda Bay by explorer Robert Cavelier de La Salle. He intended to found the colony at the mouth of the Mississippi River, but inaccurate maps and navigational errors caused his ships to anchor instead 400 miles (640 km) to the west, off the coast of Texas. The colony survived until 1688. The present-day town of Inez is near the fort's site. The colony faced numerous difficulties during its brief existence, including Native American raids, epidemics, and harsh conditions. From that base, La Salle led several expeditions to find the Mississippi River. These did not succeed, but La Salle did explore much of the Rio Grande and parts of east Texas.
During one of his absences in 1686, the colony's last ship was wrecked, leaving the colonists unable to obtain resources from the French colonies of the Caribbean. As conditions deteriorated, La Salle realized the colony could survive only with help from the French settlements in Illinois Country to the north, along the Mississippi and Illinois rivers. La Salle's last expedition ended along the Brazos River in early 1687, when he and five of his men were murdered during a mutiny. Although a handful of men reached Illinois Country, help never made it to the fort. Most of the remaining members of the colony were killed during a Karankawa raid in late 1688, though four children survived after being adopted as captives. Although the colony lasted only three years, it established France's claim to possession of the region that is now Texas. The United States later claimed, unsuccessfully, this region as part of the Louisiana Purchase because of the early French colony. (Full article...) -
Surtsey ("Surtr's island" in Icelandic, Icelandic pronunciation: [ˈsʏr̥(t)sˌeiː] ) is an uninhabited volcanic island located in the Vestmannaeyjar archipelago off the southern coast of Iceland. At Surtsey is the southernmost point of Iceland. It was formed in a volcanic eruption which began 130 metres (430 feet) below sea level, and reached the surface on 14 November 1963. The eruption lasted until 5 June 1967, when the island reached its maximum size of 2.7 km (1.0 sq mi). Since then, wave erosion has caused the island to steadily diminish in size: , its surface area was 1.3 km (0.50 sq mi). The most recent survey (2007) shows the island's maximum elevation at 155 m (509 ft) above sea level.
The new island was named after Surtr, a fire jötunn or giant from Norse mythology. It was intensively studied by volcanologists during its eruption, and afterwards by botanists and other biologists as life forms gradually colonised the originally barren island. The undersea vents that produced Surtsey are part of the Vestmannaeyjar submarine volcanic system, part of the fissure of the sea floor called the Mid-Atlantic Ridge. Vestmannaeyjar also produced the famous eruption of Eldfell on the island of Heimaey in 1973. The eruption that created Surtsey also created a few other small islands along this volcanic chain, such as Jólnir and other, unnamed peaks. Most of these eroded away fairly quickly. It is estimated that Surtsey will remain above sea level until at least the year 2100. (Full article...)
A series of small volcanic earthquakes measuring less than 4.0 on the Richter magnitude scale took place in the sparsely populated Nazko area of the Central Interior of British Columbia, Canada, from October 9, 2007, to June 12, 2008. They occurred just west of Nazko Cone, a small tree-covered cinder cone that last erupted about 7,200 years ago.
No damage or casualties resulted from the Nazko earthquakes, which were too small to be felt by people, but local seismographs recorded them. The earthquake swarm occurred at the eastern end of a known volcanic zone called the Anahim Volcanic Belt. This is an east–west trending line of volcanic formations extending from the Central Coast to the Central Interior of British Columbia. (Full article...)
El Tatio is a geothermal field with many geysers located in the Andes Mountains of northern Chile at 4,320 metres (14,170 ft) above mean sea level. It is the third-largest geyser field in the world and the largest in the Southern Hemisphere. Various meanings have been proposed for the name "El Tatio", including "oven" or "grandfather". The geothermal field has many geysers, hot springs, and associated sinter deposits. These hot springs eventually form the Rio Salado, a major tributary of the Rio Loa, and are a major source of arsenic pollution in the river. The vents are sites of populations of extremophile microorganisms such as hyperthermophiles, and El Tatio has been studied as an analogue for the early Earth and possible past life on Mars.
El Tatio lies at the western foot of a series of stratovolcanoes, which runs along the border between Chile and Bolivia. This series of volcanoes is part of the Central Volcanic Zone, one of several volcanic belts in the Andes, and of the Altiplano–Puna volcanic complex (APVC). This is a system of large calderas and associated ignimbrites, which have been the sources of supereruptions between 10 and 1 million years ago. Some of these calderas may be the source of heat for the El Tatio geothermal system. There are no recorded eruptions of the Tatio volcanoes in the historical period. (Full article...)
The Rogue River (Tolowa: yan-shuu-chit’ taa-ghii~-li~’, Takelma: tak-elam) in southwestern Oregon in the United States flows about 215 miles (346 km) in a generally westward direction from the Cascade Range to the Pacific Ocean. Known for its salmon runs, whitewater rafting, and rugged scenery, it was one of the original eight rivers named in the Wild and Scenic Rivers Act of 1968. Beginning near Crater Lake, which occupies the caldera left by the explosive volcanic eruption and collapse of Mount Mazama, the river flows through the geologically young High Cascades and the older Western Cascades, another volcanic province. Further west, the river passes through multiple exotic terranes of the more ancient Klamath Mountains. In the Kalmiopsis Wilderness section of the Rogue basin are some of the world's best examples of rocks that form the Earth's mantle. Near the mouth of the river, the only dinosaur fragments ever discovered in Oregon were found in the Otter Point Formation, along the coast of Curry County.
People have lived along the Rogue River and its tributaries for at least 8,500 years. European explorers made first contact with Native Americans (Indians) toward the end of the 18th century and began beaver trapping and other activities in the region. Clashes, sometimes deadly, occurred between the natives and the trappers and later between the natives and European-American miners and settlers. These struggles culminated with the Rogue River Wars of 1855–56 and removal of most of the natives to reservations outside the basin. After the war, settlers expanded into remote areas of the watershed and established small farms along the river between Grave Creek and the mouth of the Illinois River. They were relatively isolated from the outside world until 1895, when the Post Office Department added mail boat service along the lower Rogue. As of 2010, the Rogue has one of the two remaining rural mail-boat routes in the United States. (Full article...)
Carrington Moss is a large area of peat bog near Carrington, Greater Manchester, England, south of the River Mersey, 10 miles (16 km) south-west of Manchester. It occupies an area of about 1,100 acres (450 ha). The depth of peat varies between 17 and 20 feet (5.2 and 6.1 m).
Originally an unused area of grouse moorland, the moss was reclaimed in the latter half of the 19th century for farming and the disposal of Manchester's waste. A system of tramways was built to connect it with the Manchester Ship Canal and a nearby railway line. In the Second World War, the land was used as a Starfish site and in the latter half of the 20th century a large industrial complex was built along its northern edge. More recently, several sporting facilities have been built on Carrington Moss. (Full article...)
Manzanar is the site of one of ten American concentration camps, where more than 120,000 Japanese Americans were incarcerated during World War II from March 1942 to November 1945. Although it had over 10,000 inmates at its peak, it was one of the smaller internment camps. It is located at the foot of the Sierra Nevada mountains in California's Owens Valley, between the towns of Lone Pine to the south and Independence to the north, approximately 230 miles (370 km) north of Los Angeles. Manzanar means "apple orchard" in Spanish. The Manzanar National Historic Site, which preserves and interprets the legacy of Japanese American incarceration in the United States, was identified by the United States National Park Service as the best-preserved of the ten former camp sites.
The first Japanese Americans arrived at Manzanar in March 1942, just one month after President Franklin D. Roosevelt signed Executive Order 9066, to build the camp their families would be staying in. Manzanar was in operation as an internment camp from 1942 until 1945. Since the last of those incarcerated left in 1945, former detainees and others have worked to protect Manzanar and to establish it as a National Historic Site to ensure that the history of the site, along with the stories of those who were incarcerated there, is recorded for current and future generations. The primary focus is the Japanese American incarceration era, as specified in the legislation that created the Manzanar National Historic Site. The site also interprets the former town of Manzanar, the ranch days, the settlement by the Owens Valley Paiute, and the role that water played in shaping the history of the Owens Valley. (Full article...)
The orca (Orcinus orca), or killer whale, is a toothed whale that is the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus. Orcas are recognizable by their black-and-white patterned body. A cosmopolitan species, they are found in diverse marine environments, from Arctic to Antarctic regions to tropical seas.
Orcas are apex predators with a diverse diet. Individual populations often specialize in particular types of prey. This includes a variety of fish, sharks, rays, and marine mammals such as seals and other dolphins and whales. They are highly social; some populations are composed of highly stable matrilineal family groups (pods). Their sophisticated hunting techniques and vocal behaviors, often specific to a particular group and passed along from generation to generation, are considered to be manifestations of animal culture. (Full article...)
Dorset (/ˈdɔːrsɪt/ DOR-sit; archaically: Dorsetshire /ˈdɔːrsɪt.ʃɪər, -ʃər/ DOR-sit-sheer, -shər) is a ceremonial county in South West England. It is bordered by Somerset to the north-west, Wiltshire to the north and the north-east, Hampshire to the east, the Isle of Wight across the Solent to the south-east, the English Channel to the south, and Devon to the west. The largest settlement is Bournemouth, and the county town is Dorchester.
The county has an area of 2,653 km (1,024 sq mi) and a population of 772,268. Around half of the population lives in the South East Dorset conurbation, which contains three of the county's largest settlements: Bournemouth (183,491), Poole (151,500), and Christchurch (31,372). The remainder of the county is largely rural, and its principal towns are Weymouth (53,427) and Dorchester (21,366). Dorset contains two unitary authority areas: Bournemouth, Christchurch and Poole, and Dorset. The county did not historically include Bournemouth and Christchurch, which were part of Hampshire. (Full article...)
SMS Kurfürst Friedrich Wilhelm ("His Majesty's Ship Prince-elector Friedrich Wilhelm") was one of the first ocean-going battleships of the German Kaiserliche Marine (Imperial Navy). The ship was named for Prince-elector (Kurfürst) Friedrich Wilhelm, 17th-century Duke of Prussia and Margrave of Brandenburg. She was the fourth pre-dreadnought of the Brandenburg class, along with her sister ships Brandenburg, Weissenburg, and Wörth. She was laid down in 1890 in the Imperial Dockyard in Wilhelmshaven, launched in 1891, and completed in 1893. The Brandenburg-class battleships carried six large-caliber guns in three twin turrets, as opposed to four guns in two turrets, as was the standard in other navies.
Kurfürst Friedrich Wilhelm served as the flagship of the Imperial fleet from her commissioning in 1894 until 1900. She saw limited active duty during her service career with the German fleet due to the relatively peaceful nature of the late 19th and early 20th centuries. As a result, her career focused on training exercises and goodwill visits to foreign ports. These training maneuvers were nevertheless very important to developing German naval tactical doctrine in the two decades before World War I, especially under the direction of Alfred von Tirpitz. She, along with her three sisters, saw only one major overseas deployment, to China in 1900–1901, during the Boxer Uprising. The ship underwent a major modernization in 1904–1905. (Full article...)
Frederick II (German: Friedrich II.; 24 January 1712 – 17 August 1786) was the monarch of Prussia from 1740 until 1786. He was the last Hohenzollern monarch titled King in Prussia, declaring himself King of Prussia after annexing Royal Prussia from the Polish–Lithuanian Commonwealth in 1772. His most significant accomplishments include his military successes in the Silesian wars, his reorganisation of the Prussian Army, the First Partition of Poland, and his patronage of the arts and the Enlightenment. Prussia greatly increased its territories and became a major military power in Europe under his rule. He became known as Frederick the Great (German: Friedrich der Große) and was nicknamed "Old Fritz" (German: der Alte Fritz).
In his youth, Frederick was more interested in music and philosophy than war, which led to clashes with his authoritarian father, Frederick William I of Prussia. However, upon ascending to the throne, he attacked and annexed the rich Austrian province of Silesia in 1742, winning military acclaim. He became an influential military theorist, whose analyses emerged from his extensive personal battlefield experience and covered issues of strategy, tactics, mobility and logistics. (Full article...)
Laguna del Maule is a volcanic field in the Andes mountain range of Chile, close to, and partly overlapping, the Argentina–Chile border. The bulk of the volcanic field is in the Talca Province of Chile's Maule Region. It is a segment of the Southern Volcanic Zone, part of the Andean Volcanic Belt. The volcanic field covers an area of 500 km (190 sq mi) and features at least 130 volcanic vents. Volcanic activity has generated cones, lava domes, lava coulees and lava flows, which surround the Laguna del Maule lake. The field gets its name from the lake, which is also the source of the Maule River.
The field's volcanic activity began 1.5 million years ago during the Pleistocene epoch; such activity has continued into the postglacial and Holocene epoch after glaciers retreated from the area. Postglacial volcanic activity has included eruptions with simultaneous explosive and effusive components, as well as eruptions with only one component. In the postglacial era, volcanic activity has increased at Laguna del Maule, with the volcanic field rapidly inflating during the Holocene. Three major caldera-forming eruptions took place in the volcanic field prior to the last glacial period. The most recent eruptions in the volcanic field took place 2,500 ± 700, 1,400 ± 600 and 800 ± 600 years ago and generated lava flows; today geothermal phenomena occur at Laguna del Maule. Volcanic rocks in the field include basalt, andesite, dacite and rhyolite; the latter along with rhyodacite makes up most of the Holocene rocks. In pre-Columbian times, the field was a regionally important source of obsidian. (Full article...)
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