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Makgadikgadi Basin
The Makgadikgadi Pan (Tswana pronunciation ), a salt pan situated in the middle of the dry savanna of north-eastern Botswana, is one of the largest salt flats in the world. The pan is all that remains of the formerly enormous Lake Makgadikgadi, which once covered an area larger than Switzerland, but dried up tens of thousands of years ago. Recent studies of human mitochondrial DNA suggest that modern ''Homo sapiens'' first began to evolve in this region some 200,000 years ago, when it was a vast, exceptionally fertile area of lakes, rivers, marshes, woodlands and grasslands especially favorable for habitation by evolving hominins and other mammals. Location and description Lying southeast of the Okavango Delta and surrounded by the Kalahari Desert, Makgadikgadi is technically not a single pan, but many pans with sandy desert in between, the largest being the Sua (Sowa), Ntwetwe and Nxai Pans. The largest individual pan is about . In comparison, Salar de Uyuni in Boli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Pan (geology)
Natural salt pans or salt flats are flat expanses of ground covered with salt and other minerals, usually shining white under the sun. They are found in deserts and are natural formations (unlike salt evaporation ponds, which are artificial). A salt pan forms by evaporation of a water pool, such as a lake or pond. This happens in climates where the rate of water evaporation exceeds the rate of that is, in a desert. If the water cannot drain into the ground, it remains on the surface until it evaporates, leaving behind minerals precipitated from the salt ions dissolved in the water. Over thousands of years, the minerals (usually salts) accumulate on the surface. These minerals reflect the sun's rays (through radiation) and often appear as white areas. Salt pans can be dangerous. The crust of salt can conceal a quagmire of mud that can engulf a truck. The Qattara Depression in the eastern Sahara Desert contains many such traps which served as strategic barriers during World ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ntwetwe Pan
The Ntwetwe Pan is a large salt pan within the Makgadikgadi region of Botswana. The Ntwetwe is one of three large pans within the Makgadikgadi, the other two being Nxai Pan and Sua Pan. Ntwetwe Pan is now a seasonal lake with filling occurring in the rainy season. Ntwetwe was first described to the European world by David Livingstone, pursuant to his explorations in this region. Significant archaeological recoveries have occurred within the Nwetwe Pan, including Stone Age tools from people who lived in this area, in an earlier time of prehistory when a large year round lake occupied the Nwetwe Pan area within the Makgadikgadi.C.M.Hogan, 2008 See also * Semowane River References * David Livingstone (1868) ''Missionary Travels and Researches in South Africa: Including a Sketch of Sixteen Years' Residence in the Interior of Africa'', Harper Publishers. * Bryan Robert Davies and Keith F. Walker (1986) ''The Ecology Ecology () is the study of the relationships between livi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kubu Island
Kubu Island (Ga'nnyo) is a dry granite rock island located in the Makgadikgadi Pan area of Botswana. The island is located a few kilometers away from Orapa and Letlhakane mining towns and can be accessed through Mmatshumo in the Boteti district. The entire island is a national monument, and is considered a sacred site by the indigenous people of the area. It is accessible by four wheel drive vehicles and has basic camping facilities. The campsite is run for the benefit of the local population. ''Top Gear'' presenter Jeremy Clarkson described the island as "just about the most astonishing place I've ever been" on the Botswana Special episode. Natural history The Makgadikgadi Pan is a large salt pan in northern Botswana, the largest salt flat complex in the world. These salt pans cover approximately 16,000 km2 and form the bed of the ancient Lake Makgadikgadi that began evaporating millennia ago. Archaeological heritage The name ''Kubu'' means either "large rock" in the Kal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graben
In geology, a graben () is a depressed block of the crust of a planet or moon, bordered by parallel normal faults. Etymology ''Graben'' is a loan word from German, meaning 'ditch' or 'trench'. The word was first used in the geologic context by Eduard Suess in 1883. The plural form is either ''graben'' or ''grabens''. Formation A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward. Graben often occur side by side with horsts. Horst and graben structures indicate tensional forces and crustal stretching. Graben are produced from parallel normal faults, where the displacement of the hanging wall is downward, while that of the footwall is upward. The faults typically dip toward the center of the graben from both sides. Horsts are parallel blocks that remain between graben; the bounding faults of a horst typically dip away from the center line of the horst. Single or multiple graben can produce a rift valley. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonics
Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents known as cratons, and the ways in which the relatively rigid plates that constitute the Earth's outer shell interact with each other. Tectonics also provide 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. Main types of tectonic regime Extensional tectonics Extensional tectonics is associated with the stretching and thinning of the crust or the lithosphere. This type of tectonics is foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crust (geology)
In geology, the crust is the outermost solid shell of a rocky planet, dwarf planet, or natural satellite. It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be distinguished based on its phase (solid crust vs. liquid mantle). The crusts of Earth, Mercury, Venus, Mars, Io, the Moon and other planetary bodies formed via igneous processes and were later modified by erosion, impact cratering, volcanism, and sedimentation. Most terrestrial planets have fairly uniform crusts. Earth, however, has two distinct types: continental crust and oceanic crust. These two types have different chemical compositions and physical properties and were formed by different geological processes. Types of crust Planetary geologists divide crust into three categories based on how and when it formed. Primary crust / primordial crust This is a planet's "original" crust. It forms from solidification of a magma ocean. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria Falls National Park Marker
Victoria most commonly refers to: * Victoria (Australia), a state of the Commonwealth of Australia * Victoria, British Columbia, provincial capital of British Columbia, Canada * Victoria (mythology), Roman goddess of Victory * Victoria, Seychelles, the capital city of the Seychelles * Queen Victoria (1819–1901), Queen of the United Kingdom (1837–1901), Empress of India (1876–1901) Victoria may also refer to: People * Victoria (name), including a list of people with the name * Princess Victoria (other), several princesses named Victoria * Victoria (Gallic Empire) (died 271), 3rd-century figure in the Gallic Empire * Victoria, Lady Welby (1837–1912), English philosopher of language, musician and artist * Victoria of Baden (1862–1930), queen-consort of Sweden as wife of King Gustaf V * Victoria, Crown Princess of Sweden (born 1977) * Victoria, ring name of wrestler Lisa Marie Varon (born 1971) * Victoria (born 1987), professional name of Song Qian, Chinese sin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makgadikgadi Basin
The Makgadikgadi Pan (Tswana pronunciation ), a salt pan situated in the middle of the dry savanna of north-eastern Botswana, is one of the largest salt flats in the world. The pan is all that remains of the formerly enormous Lake Makgadikgadi, which once covered an area larger than Switzerland, but dried up tens of thousands of years ago. Recent studies of human mitochondrial DNA suggest that modern ''Homo sapiens'' first began to evolve in this region some 200,000 years ago, when it was a vast, exceptionally fertile area of lakes, rivers, marshes, woodlands and grasslands especially favorable for habitation by evolving hominins and other mammals. Location and description Lying southeast of the Okavango Delta and surrounded by the Kalahari Desert, Makgadikgadi is technically not a single pan, but many pans with sandy desert in between, the largest being the Sua (Sowa), Ntwetwe and Nxai Pans. The largest individual pan is about . In comparison, Salar de Uyuni in Boli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chobe National Park
Chobe National Park is Botswana's first national park, and also the most biologically diverse. Located in the north of the country, it is Botswana's third largest park, after Central Kalahari Game Reserve and Gemsbok National Park, and has one of the greatest concentrations of game in all of Africa. This park is noted for having a population of lions which prey on elephants, mostly calves or juveniles, but also subadults. History The original inhabitants of this area were the San bushmen (also known as the Basarwa people in Botswana). They were nomadic hunter-gatherers who were constantly moving from place to place to find food sources, namely fruit, water and wild animals. Nowadays one can find San paintings inside rocky hills of the park. At the beginning of the 20th century, the region that would become Botswana was divided into different land tenure systems. At that time, a major part of the park's area was classified as crown land. The idea of a national park whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeological
Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology is distinct from palaeontology, which is the study of fossil remains. Archaeology is particularly important for learning about prehistoric societies, for which, by definition, there are no written records. Prehistory includes over 99% of the human past, from the Paleolithic until the advent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalahari Basin
The Kalahari Basin, also known as the Kalahari Depression, Okavango Basin or the Makgadikgadi basin, is an endorheic basin and large lowland area covering approximately 725,293 km2 covering most of Botswana and Namibia, as well as parts of Angola, South Africa, Zambia, and Zimbabwe. The outstanding physical feature in the basin, and occupying the centre, is the large Kalahari Desert. The perennial river bifurcation of Selinda Spillway (or Magweggana River), on the Cuando River, connects the Kalahari basin to the Zambezi Basin.Is this Harry and Meghan's honeymoon hotel? The Telegraph. 29 may 2018. General characteristics of the basin The |
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