|
Salar De Uyuni
Salar de Uyuni (or "Salar de Tunupa") is the world's largest salt flat, or playa, at over in area. It is in the Daniel Campos Province in Potosí in southwest Bolivia, near the crest of the Andes at an elevation of above sea level. The Salar was formed as a result of transformations between several prehistoric lakes that existed around forty thousand years ago but had all evaporated over time. It is now covered by a few meters of salt crust, which has an extraordinary flatness with the average elevation variations within one meter over the entire area of the Salar. The crust serves as a source of salt and covers a pool of brine, which is exceptionally rich in lithium. The large area, clear skies, and exceptional flatness of the surface make the Salar ideal for calibrating the altimeters of Earth observation satellites. Following rain, a thin layer of dead calm water transforms the flat into the world's largest mirror, across. The Salar serves as the major transport route a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Campos Province
Daniel Campos is a province in the north-western parts of the Bolivian Potosí Department. It is named after the poet Daniel Campos who originated from this area. The capital of the province is Llica. Location Daniel Campos province is one of sixteen provinces in the Potosí Department. It is located between 19° 25' and 20° 50' South and between 66° 49' and 68° 47' West. It borders Oruro Department in the north, the Republic of Chile in the west, Nor Lípez Province in the south, and Antonio Quijarro Province in the east. The province extends over 240 km from east to west and 180 km from north to south. Geography The province is situated in the salt flats of the southern Altiplano, more than 65% of the province being covered by Salar de Uyuni. Salar de Uyuni is situated at an average level of 3,657 m amsl, the highest point of the province is Tutuni ''(Alto Totoni)'' (5,740 m) in the Cordillera Sillaguay on the Chilean border. The climate is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atacama Desert
The Atacama Desert ( es, Desierto de Atacama) is a desert plateau in South America covering a 1,600 km (990 mi) strip of land on the Pacific coast, west of the Andes Mountains. The Atacama Desert is the driest nonpolar desert in the world, and the second driest overall, just behind some very specific spots within the McMurdo Dry Valleys as well as the only hot true desert to receive less precipitation than the polar deserts, and the largest fog desert in the world. Both regions have been used as experimentation sites on Earth for Mars expedition simulations. The Atacama Desert occupies , or if the barren lower slopes of the Andes are included. Most of the desert is composed of stony terrain, salt lakes (''salares''), sand, and felsic lava that flows towards the Andes. The desert owes its extreme aridity to a constant temperature inversion due to the cool north-flowing Humboldt ocean current and to the presence of the strong Pacific anticyclone. The most arid re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lago Uru Uru
__NOTOC__ Uru Uru Lake is a lake in the Oruro Department in Bolivia. It is fed by the Desaguadero River and the Jach'a Jawira. It is situated at an elevation of 3,686 m, its surface area is 214 km2. The lake is formed by the flow of the Desaguadero River at its mouth into Lake Poopó, over the extensive sedimentation known as "Santo Tomás" from the small hermitage found there that was completely inundated. The formation dates to 1962. The river connects Lake Titicaca and Lake Poopó. Ecology The lake used to be a tourist attraction for boating and fishing, as it contained a large number of fish. During a long drought in 2016, the lake lost almost all of its water. This was described by local media and experts as an environmental catastrophe caused by several factors, including climate change and the use of water for mining. In 2021, a large part of the lake is covered by trash. Much of it is plastic from nearby Oruro where residents dump their refuse. There is also cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Poopó
__NOTOC__ Lake Poopó ( es, Lago Poopó ) was a large saline lake in a shallow depression in the Altiplano Mountains in Oruro Department, Bolivia, at an altitude of approximately . Because the lake was long and wide (), it made up the eastern half of the department, known as a mining region in southwest Bolivia. The permanent part of the lake body covered approximately and it was the second-largest lake in the country. The lake received most of its water from the Desaguadero River, which flows from Lake Titicaca at the north end of the Altiplano. Since the lake lacked any major outlet and had a mean depth of less than , the surface area differed greatly seasonally. In 2002 the lake was designated as a site for conservation under the Ramsar Convention. By December 2015, the lake had completely dried up, leaving only a few marshy areas. Although the lake has dried up completely twice in the past, it does not appear that it will recover this time. Suggested causes of the declin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Tauca
Lake Tauca is a former lake in the Altiplano of Bolivia. It is also known as Lake Pocoyu for its constituent lakes: Lake Poopó, Salar de Coipasa and Salar de Uyuni. The lake covered large parts of the southern Altiplano between the Eastern Cordillera and the Western Cordillera, covering an estimated of the basins of present-day Lake Poopó and the Salars of Uyuni, Coipasa and adjacent basins. Water levels varied, possibly reaching in altitude. The lake was saline. The lake received water from Lake Titicaca, but whether this contributed most of Tauca's water or only a small amount is controversial; the quantity was sufficient to influence the local climate and depress the underlying terrain with its weight. Diatoms, plants and animals developed in the lake, sometimes forming reef knolls. The duration of Lake Tauca's existence is uncertain. Research in 2011 indicated that the rise in lake levels began 18,500 BP, peaking 16,000 and 14,500 years ago. About 14,200 years ago, la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbonate Platform
A carbonate platform is a sedimentary body which possesses topographic relief, and is composed of autochthonic calcareous deposits. Platform growth is mediated by sessile organisms whose skeletons build up the reef or by organisms (usually microbes) which induce carbonate precipitation through their metabolism. Therefore, carbonate platforms can not grow up everywhere: they are not present in places where limiting factors to the life of reef-building organisms exist. Such limiting factors are, among others: light, water temperature, transparency and pH-Value. For example, carbonate sedimentation along the Atlantic South American coasts takes place everywhere but at the mouth of the Amazon River, because of the intense turbidity of the water there. Spectacular examples of present-day carbonate platforms are the Bahama Banks under which the platform is roughly 8 km thick, the Yucatan Peninsula which is up to 2 km thick, the Florida platform, the platform on which the Grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment
Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification. Sediments are most often transported by water (fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice-transported sediments. Classification Sediment can be classified based on its grain size, grain shape, and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiocarbon Dating
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed in the late 1940s at the University of Chicago by Willard Libby. It is based on the fact that radiocarbon () is constantly being created in the Earth's atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and thereafter the amount of it contains begins to decrease as the undergoes radioactive decay. Measuring the amount of in a sample from a dead plant or animal, such as a piece of wood or a fragment of bone, provides information that can be used to calc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Minchin
Lake Minchin is a name of an ancient lake in the Altiplano of South America. It existed where today the Salar de Uyuni, Salar de Coipasa and Lake Poopó lie. It was formerly considered the highest lake in the Altiplano but research indicated that the highest shoreline belongs to the later Lake Tauca instead. The concept of a "Lake Minchin" was first coined in 1906 and the name is based on John B. Minchin. The dating of the lake varies but probably lasted until 22,000 – 21,000 BP. A glacier advance was in progress in the Andes during that time period. The name "Minchin" has also been used in other contexts, and it has been proposed that the lake was actually a combination of several different paleolakes. Definition The name "Lake Minchin" has been used inconsistently to refer to either a lake existing 45,000 years ago, the highest lake in the Altiplano, or to sediment formations. This confusion has led to calls to drop the usage of the name "Minchin". An alternative theory ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salar De Uyuni, Bolivia, 2016-02-04, DD 10-12 HDR
Salar may refer to: Places *Salar, Spain, a municipality in Granada *Salar, Murshidabad, a census town in West Bengal, India **Salar railway station *Salar, Uzbekistan, a town in Tashkent District *Kampong Salar, a village in Mukim Mentiri, Brunei-Muara District, Brunei People *Salar people, an ethnic group in China **Salar language, the language of the Salar People *Salar (name), a Persian first name given to boys *Sayf al-Din Salar Sayf al-Dīn Salār al-Manṣūrī (–September or October 1310) was the viceroy of the Mamluk sultan al-Nasir Muhammad during the latter's second reign (1299–1310). As a boy he was taken captive at the Battle of Elbistan in 1277 and became a ma ... (c. 1260s–1310), viceroy of the Mamluk sultan al-Nasir Muhammad See also * * * Salares, a town and municipality in Málaga, Andalusia, Spain {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA Earth Observatory
NASA Earth Observatory is an online publishing outlet for NASA which was created in 1999. It is the principal source of satellite imagery and other scientific information pertaining to the climate and the Environment (biophysical), environment which are being provided by NASA for consumption by the general public. It is funded with public money, as authorized by the United States Congress, and is part of the EOS Project Science Office located at Goddard Space Flight Center. , NASA Earth Observatory has won the Webby Awards, Webby People's Voice Award in Education three times. There were a series of publicized images issued by the website in 2008, including imagery of clouds streaming over the Caspian Sea, dust storms curling off the coast of Morocco, the crumbling of the Wilkins Ice Shelf, Hurricane Bertha (2008), Hurricane Bertha, and others. See also * Earth observation ** Earth observation satellite * Space exploration References External links * NASA NASA onli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uyuni Landsat
Uyuni (Aymara, ''uyu'' pen (enclosure), yard, cemetery, ''-ni'' a suffix to indicate ownership, "the one that has got a pen", "the one with a pen") is a city in the southwest of Bolivia. Uyuni primarily serves as a gateway for tourists visiting the world's largest salt flats, the nearby Uyuni salt flat. Each year the city receives approximately 60,000 visitors from around the globe. The city also acts as a gateway for commerce and traffic crossing into and out of Bolivia from and to Chile, and there is a customs and immigration post downtown. Agriculture in the area is generally limited to quinoa, llamas, and sheep. Founded in 1890 as a trading post, the city has a population of 29,672 (2012 official census). The town has an extensive street-market. It lies at the edge of an extensive plain at an elevation of above sea level, with more mountainous country to the east. Transport It is an important transport hub, being the location of a major railway junction. Four lines join ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
