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Desert Rose (crystal)
A desert rose is an intricate rose-like formation of crystal clusters of gypsum or baryte, which include abundant sand grains. The "petals" are crystals flattened on the ''c'' axis, fanning open in radiating clusters. The rosette crystal habit tends to occur when the crystals form in arid sandy conditions, such as the evaporation of a shallow salt basin. The crystals form a circular array of flat plates, giving the rock a shape similar to a rose blossom. Gypsum roses usually have better defined, sharper edges than baryte roses. Celestine and other bladed evaporite minerals may also form rosette clusters. They can appear either as a single rose-like bloom or as clusters of blooms, typically ranging from pea-sized to in diameter. The ambient sand that is incorporated into the crystal structure, or otherwise encrusts the crystals, varies with the local environment. If iron oxides are present, the rosettes take on a rusty tone. The desert rose may also be known by the nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roses Des Sables Tunisie
A rose is either a woody perennial flowering plant of the genus ''Rosa'' (), in the family Rosaceae (), or the flower it bears. There are over three hundred species and tens of thousands of cultivars. They form a group of plants that can be erect shrubs, climbing, or trailing, with stems that are often armed with sharp prickles. Their flowers vary in size and shape and are usually large and showy, in colours ranging from white through yellows and reds. Most species are native to Asia, with smaller numbers native to Europe, North America, and northwestern Africa. Species, cultivars and hybrids are all widely grown for their beauty and often are fragrant. Roses have acquired cultural significance in many societies. Rose plants range in size from compact, miniature roses, to climbers that can reach seven meters in height. Different species hybridize easily, and this has been used in the development of the wide range of garden roses. Etymology The name ''rose'' comes from Lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron Oxides
Iron oxides are chemical compounds composed of iron and oxygen. Several iron oxides are recognized. All are black magnetic solids. Often they are non-stoichiometric. Oxyhydroxides are a related class of compounds, perhaps the best known of which is rust. Iron oxides and oxyhydroxides are widespread in nature and play an important role in many geological and biological processes. They are used as iron ores, pigments, catalysts, and in thermite, and occur in hemoglobin. Iron oxides are inexpensive and durable pigments in paints, coatings and colored concretes. Colors commonly available are in the "earthy" end of the yellow/orange/red/brown/black range. When used as a food coloring, it has E number E172. Stoichiometries Iron oxides feature as ferrous ( Fe(II)) or ferric ( Fe(III)) or both. They adopt octahedral or tetrahedral coordination geometry. Only a few oxides are significant at the earth's surface, particularly wüstite, magnetite, and hematite. * Oxides of FeII ** F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noble, Oklahoma
Noble is a city in Cleveland County, Oklahoma, United States, and is part of the Oklahoma City Metropolitan Area. The population was 6,481 at the 2010 census. Noble is Cleveland County's third-largest city behind Norman and Moore. History On April 22, 1889, the day the first Oklahoma "Land Run" opened the Unassigned Lands in the middle of Indian Territory to settlers, J.W. Klinglesmith, Albert Rennie and several other businessmen forded the South Canadian River and laid claim to the town site that was to become Noble. The town was named in honor of Secretary of the Interior John Noble, who was instrumental in opening the Unassigned Lands to settlement. The group had great plans for Noble, hoping it would become the future county seat. The Santa Fe Railroad completed a railroad depot in Noble in August 1889. For several years, Noble was a major shipping point for cattle and other goods from both sides of the Canadian River. Business prospered even more when Charles Edwin Garee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Museum Of Qatar
The National Museum of Qatar is a national museum in Doha, Qatar. The current building opened to the public on 28 March 2019, replacing the previous building which opened in 1975. The building was designed by architect Jean Nouvel who was inspired by the desert rose crystal, which can be found in Qatar. The museum site includes Sheikh Abdullah bin Jassim Al Thani's Palace, which is the heart of the Qatari national identity. As of 2013, the director of the museum is Sheikha Amna. Collection A tour of the museum takes visitors through a loop of galleries that address three major, interrelated themes. The galleries are loosely arranged in chronological order, beginning with exhibitions on the natural history of the desert and the Persian Gulf, artefacts from Bedouin culture, historical exhibitions on the tribal wars, the establishment of the Qatari state, and finally the discovery of oil to the present. The displays and installations that explore these themes present audiovisual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garber Sandstone
The Garber Sandstone is a geologic formation from the Permian Period in Oklahoma. It serves as an important aquifer, the Garber-Wellington Aquifer, in Logan, Oklahoma, and Cleveland counties of central Oklahoma. The upper portion of the Garber is associated with extensive baryte Baryte, barite or barytes ( or ) is a mineral consisting of barium sulfate ( Ba S O4). Baryte is generally white or colorless, and is the main source of the element barium. The ''baryte group'' consists of baryte, celestine (strontium sulfate), ... mineralization associated with desert rose occurrences in the outcrop area.''Review of the General Geology and Solid-Phase Geochemical Studies in the Vicinity of the Central Oklahoma Aquifer,'' US Geological Survey Circular 1019, 1986, p. 6 See also * List of fossiliferous stratigraphic units in Oklahoma References Permian geology of Oklahoma {{Permian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permian
The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic Era. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the region of Perm in Russia. The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the sauropsids ( reptiles). The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these drier conditions, rose to dominance in place of their am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the north, Missouri on the northeast, Arkansas on the east, New Mexico on the west, and Colorado on the northwest. Partially in the western extreme of the Upland South, it is the List of U.S. states and territories by area, 20th-most extensive and the List of U.S. states and territories by population, 28th-most populous of the 50 United States. Its residents are known as Oklahomans and its capital and largest city is Oklahoma City. The state's name is derived from the Choctaw language, Choctaw words , 'people' and , which translates as 'red'. Oklahoma is also known informally by its List of U.S. state and territory nicknames, nickname, "Sooners, The Sooner State", in reference to the settlers who staked their claims on land before the official op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ghadames
Ghadames or Ghadamis ( Berber: ''ʕadémis''; ar, غدامس, Libyan vernacular: ''ɣdāməs'', Latin: ''Cidamus, Cydamus'', it, Gadames) is an oasis Berber town in the Nalut District of the Tripolitania region in northwestern Libya. The indigenous language of Ghadames is Ghadamès, a Berber language. Ghadamès, known as 'the pearl of the desert', stands in an oasis. It is one of the oldest pre-Saharan cities and an outstanding example of a traditional settlement. Its domestic architecture is characterized by a vertical division of functions: the ground floor used to store supplies; then another floor for the family, overhanging covered alleys that create what is almost an underground network of passageways; and, at the top, open-air terraces reserved for the women. Geography Ghadames lies roughly to the southwest of Tripoli, near the borders with Algeria and Tunisia. Ghadames borders Illizi Province, Algeria and Tataouine Governorate, Tunisia. The oasis has a populati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chott El Djerid
Chott el Djerid ( ar, شط الجريد ') also spelled ''Sciott Gerid'' and ''Shott el Jerid'', is a chott, a large endorheic salt lake in southern Tunisia. The name can be translated from the Arabic into English as "Lagoon of the Land of Palms". Geography The bottom of Chott el Djerid is located between 10 and 25 meters (about 30 to 80 feet) below sea level. The lake's width varies widely; at its narrowest point, it is only across, compared to its overall length of . At times, parts of it appear in various shades of white, green and purple. The narrow eastward inlet of the chott is also known as Chott el Fejej. It is the largest salt pan of the Sahara Desert, with a surface area of over 7,000 km2 (some sources state 5,000 km2). The site has a typical hot desert climate. Due to the harsh climate with mean annual rainfall of below 100 mm and daytime temperatures sometimes reaching 50 °C (122 °F) or more during summer with dense solar radiation, water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenite (mineral)
Selenite, satin spar, desert rose, gypsum flower are crystal habit varieties of the mineral gypsum. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO4·2H2O. Selenite contains no significant selenium – The similar names both derive from Greek ( 'Moon') Some of the largest crystals ever found are of selenite, the largest specimen found in the Naica Mine's Cave of the Crystals being 12 metres long and weighing 55 tons. History and etymology "Selenite" is mostly synonymous with gypsum, but from the 15th century, it has named the transparent variety that occurs in crystals or crystalline masses. The name derives through Middle English from Latin , ultimately from Greek (, ). It got this name because people historically believed the mineral waxed and waned with the cycles of the Moon. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahara
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