1.
Alluvial diagram
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Alluvial diagrams are a type of flow diagram originally developed to represent changes in network structure over time. In allusion to both their appearance and their emphasis on flow, alluvial diagrams are named after alluvial fans that are naturally formed by the soil deposited from streaming water. In an alluvial diagram, blocks represent clusters of nodes, the height of a block represents the size of the cluster and the height of a stream field represents the size of the components contained in both blocks connected by the stream field. Alluvial diagrams were originally developed to visualize structural change in large complex networks and they can be used to visualize any type of change in group composition between states or over time and include statistical information to reveal significant change. Alluvial diagrams highlight important structural changes that can be emphasized by color. Alluvial diagrams can also be used to illustrate patterns of flow on a network over time. The Users Flow feature of Google Analytics uses alluvial diagrams to represent how visitors move among the nodes on a web sites
2.
Yentna-Cache Creek mining district
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Gold was discovered in the Yentna Cache-Creek Mining District in the US state of Alaska of the upper Susitna Valley in 1898, soon followed by claim staking. Placer mining was reported in the Cache Creek drainage of the Dutch Hills by 1906, quaternary glaciofluvial deposits, alluvial deposits, and Cenozoic conglomeratic white quartz-breccia units have been mined in the Dutch Hills. About 200,000 ounces of gold has been produced from placer deposits. By 1927, a road from Talkeetna was constructed into the mining area, the mining camp of Petersville, Alaska served as the area Post Office for several years in the late 1920s and early 1930s. Two areas have set aside for recreational gold mining, the North and South units of the Petersville State Recreation Mining Areas. Many smaller one-man and family placer mining operations continue today, in addition to placer gold mining, the district has had some mining of tungsten from scheelite deposits, and small-scale lode mining for gold. The district is known due to the influence of artist Sydney Laurence. A steam-powered dragline was used to mine the deposits of Peters Creek. The tailings of that operation can be today, and the area is part of the Petersville State Recreation Mining Area. A cluster of deposits is in the part of the Yentna district. The productive deposits here have been placer gold deposits with byproduct platinum, assays exceeding 1 ounce of gold per ton have been obtained from three of these areas, and selected quartz-arsenopyrite vein material from one prospect assayed about 200 ounces of gold per ton. A bucketline dredge was constructed in Cache Creek in the 1920s, later, a hydroelectric plant was used to run the dredge. The dredge mined the entire valley of Cache Creek as far as the mouth of Nugget Creek, hydraulic mining was also widely used before 1942, and many ditches can be found all over the Dutch Hills today. About 115,000 ounces of gold was reported to have been produced from Cache Creek. An active placer mine operated in 1998-1999, the first reported mining in what was to become The Blue Ribbon Mine took place in 1906. Except for some stretches when no mining took place, some gold has probably been recovered every year since, the total amount recovered is unknown, but at least 20,000 ounces have been reported recovered, mostly by small-scale hand or mechanized methods. The placer mine continues operating today, and the company is actively exploring lode deposits
3.
Alaska
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Alaska is a U. S. state located in the northwest extremity of North America. To the north are the Chukchi and Beaufort seas–the southern parts of the Arctic Ocean, the Pacific Ocean lies to the south and southwest. Alaska is the largest state in the United States by area, the 3rd least populous, approximately half of Alaskas residents live within the Anchorage metropolitan area. Alaskas economy is dominated by the fishing, natural gas, military bases and tourism are also a significant part of the economy. The United States purchased Alaska from the Russian Empire on March 30,1867, the area went through several administrative changes before becoming organized as a territory on May 11,1912. It was admitted as the 49th state of the U. S. on January 3,1959, the name Alaska was introduced in the Russian colonial period when it was used to refer to the peninsula. It was derived from an Aleut, or Unangam idiom, which refers to the mainland of Alaska. Literally, it means object to which the action of the sea is directed, Alaska is the northernmost and westernmost state in the United States and has the most easterly longitude in the United States because the Aleutian Islands extend into the Eastern Hemisphere. Alaska is the only non-contiguous U. S. state on continental North America and it is technically part of the continental U. S. but is sometimes not included in colloquial use, Alaska is not part of the contiguous U. S. often called the Lower 48. The capital city, Juneau, is situated on the mainland of the North American continent but is not connected by road to the rest of the North American highway system. Alaskas territorial waters touch Russias territorial waters in the Bering Strait, as the Russian Big Diomede Island, Alaska has a longer coastline than all the other U. S. states combined. Alaska is the largest state in the United States by total area at 663,268 square miles, over twice the size of Texas, Alaska is larger than all but 18 sovereign countries. Counting territorial waters, Alaska is larger than the area of the next three largest states, Texas, California, and Montana. It is also larger than the area of the 22 smallest U. S. states. Also referred to as the Panhandle or Inside Passage, this is the region of Alaska closest to the rest of the United States, as such, this was where most of the initial non-indigenous settlement occurred in the years following the Alaska Purchase. The region is dominated by the Alexander Archipelago as well as the Tongass National Forest and it contains the state capital Juneau, the former capital Sitka, and Ketchikan, at one time Alaskas largest city. The Alaska Marine Highway provides a vital transportation link throughout the area. The Interior is the largest region of Alaska, much of it is uninhabited wilderness, Fairbanks is the only large city in the region
4.
Gamtoos River
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Gamtoos River or Gamptoos River is a river in the Eastern Cape Province, South Africa. It is formed by the confluence of the Kouga River and the Groot River and is approximately 645-kilometre long with a catchment area of 34,635 square kilometres, the Gamtoos river system is formed by the Groot, the Kouga and the Baviaanskloof Rivers. The latter is a tributary of the Kouga, although the rainfall in the catchment area is low, it supports a commercial irrigated agriculture in the lower catchment in which oranges, tobacco, citrus fruit and vegetables are grown. There is an estuary where the Gamtoos river enters the Indian Ocean and it is located between Jeffreys Bay and Port Elizabeth and the Gamtoos River Mouth Nature Reserve is in the area. The towns of Hankey, the oldest town situated in the Gamtoos river valley, further inland are the towns of Steytlerville, Joubertina, Uniondale, Willowmore and Murraysburg. Tributaries include the Loerie River, Klein River, Hol River, besides the Groot, saartjie Baartman - the Hottentot Venus - was born around 1789 in the vicinity of the Gamtoos river. In 1877 during a drought in the region, the Gamtoos River dried up completely. During the floods of October 1867, according to John Croumbie Brown, two bridges cross the Gamtoos close to its mouth in the Kouga. The original 180-metre bridge on the R102 was opened in 1895 in order to replace the ferry that had been in use up to that time, a modern concrete bridge was built during the construction of the N2 in the early 1970s. Presently this river is part of the Fish to Tsitsikama Water Management Area, until then it had been thought that its distribution was restricted to the area between the Keurbooms and the Olifants River. List of rivers of South Africa List of estuaries of South Africa Media related to Gamtoos River at Wikimedia Commons Birding - Gamtoos River Mouth IUCN Red List - Galaxias zebratus
5.
South Africa
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South Africa, officially the Republic of South Africa, is the southernmost country in Africa. South Africa is the 25th-largest country in the world by land area and it is the southernmost country on the mainland of the Old World or the Eastern Hemisphere. About 80 percent of South Africans are of Sub-Saharan African ancestry, divided among a variety of ethnic groups speaking different Bantu languages, the remaining population consists of Africas largest communities of European, Asian, and multiracial ancestry. South Africa is a multiethnic society encompassing a variety of cultures, languages. Its pluralistic makeup is reflected in the recognition of 11 official languages. The country is one of the few in Africa never to have had a coup détat, however, the vast majority of black South Africans were not enfranchised until 1994. During the 20th century, the black majority sought to recover its rights from the dominant white minority, with this struggle playing a role in the countrys recent history. The National Party imposed apartheid in 1948, institutionalising previous racial segregation, since 1994, all ethnic and linguistic groups have held political representation in the countrys democracy, which comprises a parliamentary republic and nine provinces. South Africa is often referred to as the Rainbow Nation to describe the multicultural diversity. The World Bank classifies South Africa as an economy. Its economy is the second-largest in Africa, and the 34th-largest in the world, in terms of purchasing power parity, South Africa has the seventh-highest per capita income in Africa. However, poverty and inequality remain widespread, with about a quarter of the population unemployed, nevertheless, South Africa has been identified as a middle power in international affairs, and maintains significant regional influence. The name South Africa is derived from the geographic location at the southern tip of Africa. Upon formation the country was named the Union of South Africa in English, since 1961 the long form name in English has been the Republic of South Africa. In Dutch the country was named Republiek van Zuid-Afrika, replaced in 1983 by the Afrikaans Republiek van Suid-Afrika, since 1994 the Republic has had an official name in each of its 11 official languages. Mzansi, derived from the Xhosa noun umzantsi meaning south, is a name for South Africa. South Africa contains some of the oldest archaeological and human fossil sites in the world, extensive fossil remains have been recovered from a series of caves in Gauteng Province. The area is a UNESCO World Heritage site and has termed the Cradle of Humankind
6.
Alluvial plain
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An alluvial plain is a largely flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland regions, from which alluvial soil forms. As the highlands due to weathering and water flow, the sediment from the hills is transported to the lower plain. Various creeks will carry the water further to a river, lake, bay, as the sediments are deposited during flood conditions in the floodplain of a creek, the elevation of the floodplain will be raised. As this reduces the channel capacity, the creek will, over time, seek new, lower paths. These processes, over time, will form the plain. The NCSS glossary instead suggests flood plain
7.
Red Rock Canyon State Park (California)
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Red Rock Canyon State Park features scenic desert cliffs, buttes and spectacular rock formations. The park is located where the southernmost tip of the Sierra Nevada converges with the El Paso Mountains, each tributary canyon is unique, with vivid colors. After wet winters, the floral displays are notable. Wildlife includes roadrunners, hawks, lizards, mice and squirrels, the park is located on State Route 14, which connects U. S. Route 395 with the communities of Southern California, where 14 is known as the Antelope Valley Freeway. The park is 25 miles northeast of Mojave on SR14, SR14 goes through the center of the park, in the canyon itself. It is not far from Cantil, California, camping, picnic, and restroom facilities are available in several sites immediately off of California Route 14. The area was home to the Kawaiisu Indians. Some petroglyphs and pictographs are found in the El Paso mountains, the Coso People were early Native American inhabitants of this locale. The colorful rock formations in the served as landmarks during the early 1870s for 20-mule team freight wagons that stopped for water. The park protects significant paleontology sites and the remains of 1890s-era mining operations, between these two photographs,66 years have elapsed. In the 1933 picture Red Rock Canyon was on U. S. Route 6, the scenery at this point in the road eventually led to the creation of Red Rock Canyon State Park in 1968. A dirt road crosses the center of the view, in the 1999 photo, a total of 17 species are now present in the foreground. No Yuccas, Joshua trees or other plants have persisted over the 66 years between the dates of the photographs, in most of the repeat photography, few Yuccas appear to live longer than about 40 years. Many more plants appear in the 1999 view, partially in response to decreased disturbance as well as increased precipitation in the part of the 20th century. For example, the road that crossed the foreground is difficult to detect. The foreground of this view is geomorphically active, and small rills, young geomorphic surfaces, such as that portrayed in this 1999 view, support young plant assemblages that recover relatively quickly following cessation of disturbance. 40 Guns to Apache Pass, the last film of Audie Murphy, was there in 1966. The 2005 music video Cater 2 U by Destinys Child was filmed at Red Rock Canyon, list of California state parks Campbell Grant, James W. Baird and J. Kenneth Pringle
8.
Amazon basin
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The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about 7,500,000 km2 and it is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname and Venezuela. Most of the basin is covered by the Amazon Rainforest, also known as Amazonia, with a 5,500,000 km2 area of dense tropical forest, this is the largest rainforest in the world. The Amazon River rises in the Andes Mountains at the west of the basin with its tributary the Marañón River in Peru. It is usually considered to be the second longest river in the world, however, a team of Brazilian scientists has claimed that the Amazon is the longest river in the world. It covers about 6,400 km before draining into the Atlantic Ocean, the Amazon and its tributaries form the largest volume of water. The Amazon accounts for about 20% of the water carried to the oceans by rivers. Some of the Amazon rainforests are deforested because of the increasing of cattle ranches, the highest point in the watershed of the Amazon is the peak of Yerupajá at 6,635 m. The Amazon basin formerly flowed west to Pacific Ocean until the Andes formed, politically the basin is divided into the Brazilian Amazônia Legal, the Peruvian Amazon, the Amazon region of Colombia and parts of Bolivia, Ecuador and the Venezuelan state of Amazonas. Plant growth is dense and its variety of inhabitants is comparatively high due to the heavy rainfall. Little sunlight reaches the ground due to the roof canopy by plants. The ground remains dark and damp and only shade tolerant vegetation will grow here, orchids and bromeliads exploit trees and other plants to get closer to the sunlight. They grow hanging onto the branches or tree trunks with aerial roots, not as parasites, species of tropical trees native to the Amazon include Brazil nut, rubber tree and Assai palm. More than 1,400 species of mammals are found in the Amazon and its larger mammals include the jaguar, ocelot, capybara and South American tapir. About 1500 bird species inhabit the Amazon Basin, the biodiversity of the Amazon and the sheer number of diverse bird species is given by the number of different bird families that reside in these humid forests. An example of such would be the family, to which the Guianan cock-of-the-rock belong. Birds such as toucans, and hummingbirds are found here. Macaws are famous for gathering by the hundreds along the cliffs of the Amazon River
9.
Brazil
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Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. As the worlds fifth-largest country by area and population, it is the largest country to have Portuguese as an official language. Its Amazon River basin includes a vast tropical forest, home to wildlife, a variety of ecological systems. This unique environmental heritage makes Brazil one of 17 megadiverse countries, Brazil was inhabited by numerous tribal nations prior to the landing in 1500 of explorer Pedro Álvares Cabral, who claimed the area for the Portuguese Empire. Brazil remained a Portuguese colony until 1808, when the capital of the empire was transferred from Lisbon to Rio de Janeiro, in 1815, the colony was elevated to the rank of kingdom upon the formation of the United Kingdom of Portugal, Brazil and the Algarves. Independence was achieved in 1822 with the creation of the Empire of Brazil, a state governed under a constitutional monarchy. The ratification of the first constitution in 1824 led to the formation of a bicameral legislature, the country became a presidential republic in 1889 following a military coup détat. An authoritarian military junta came to power in 1964 and ruled until 1985, Brazils current constitution, formulated in 1988, defines it as a democratic federal republic. The federation is composed of the union of the Federal District, the 26 states, Brazils economy is the worlds ninth-largest by nominal GDP and seventh-largest by GDP as of 2015. A member of the BRICS group, Brazil until 2010 had one of the worlds fastest growing economies, with its economic reforms giving the country new international recognition. Brazils national development bank plays an important role for the economic growth. Brazil is a member of the United Nations, the G20, BRICS, Unasul, Mercosul, Organization of American States, Organization of Ibero-American States, CPLP. Brazil is a power in Latin America and a middle power in international affairs. One of the worlds major breadbaskets, Brazil has been the largest producer of coffee for the last 150 years and it is likely that the word Brazil comes from the Portuguese word for brazilwood, a tree that once grew plentifully along the Brazilian coast. In Portuguese, brazilwood is called pau-brasil, with the word brasil commonly given the etymology red like an ember, formed from Latin brasa and the suffix -il. As brazilwood produces a red dye, it was highly valued by the European cloth industry and was the earliest commercially exploited product from Brazil. The popular appellation eclipsed and eventually supplanted the official Portuguese name, early sailors sometimes also called it the Land of Parrots. In the Guarani language, a language of Paraguay, Brazil is called Pindorama
Chisholm, Hugh, ed. (1911). "Alluvium". Encyclopædia Britannica (11th ed.). Cambridge University Press.
Chisholm, Hugh, ed. (1911). "