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Cerro Potosí
Cerro El Potosí is the highest mountain in the Sierra Madre Oriental mountain range of northeast Mexico. It is located in the state of Nuevo León, about 80 km (50 mi) south of Monterrey. Flora and fauna It is composed of limestone, and is noted for its very diverse flora including several endemic or near-endemic species, such as the Potosi Pinyon. At the foot of the mountain, a series of springs and endorheic basins were the only site in which the pupfish '' Cyprinodon alvarezi'' and '' Megupsilon aporus'', and the dwarf crayfish ''Cambarellus alvarezi'' lived. The last two are entirely extinct, while ''Cyprinodon alvarezi'' is extinct in the wild (only survives in captivity). Access Access was very difficult in the past, but in the 1960s a microwave relay station was built on the summit, with the road built for this providing easy access from the east. Protected areas In 2000 the upper slopes of the mountain were designated an ecological reserve, covering 9.02 k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potosí
Potosí, known as Villa Imperial de Potosí in the colonial period, is the capital city and a municipality of the Department of Potosí in Bolivia. It is one of the highest cities in the world at a nominal . For centuries, it was the location of the Spanish colonial silver mint. A considerable amount of the city's colonial architecture has been preserved in the historic center of the city, which - along with the globally important Cerro Rico de Potosí - are part of a designated UNESCO World Heritage Site. Potosí lies at the foot of the ''Cerro de Potosí'' —sometimes referred to as the ''Cerro Rico'' ("rich mountain")— a mountain popularly conceived of as being "made of" silver ore that dominates the city. The Cerro Rico is the reason for Potosí's historical importance since it was the major supply of silver for the Spanish Empire until Guanajuato in Mexico surpassed it in the 18th century. The silver was taken by llama and mule train to the Pacific coast, shipped north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyprinodon Alvarezi
Potosi pupfish (''Cyprinodon alvarezi'') is a species of fish in the family Cyprinodontidae. It is endemic to Mexico, but is now extinct in the wild, only surviving in captivity. Distribution The Potosi pupfish is endemic to an isolated spring known as Ojo de Potosi near El Potosi, a settlement in southwestern Nuevo Leon state in Mexico. However, the species is now regarded as being extinct in the wild, and is represented only by captive populations. Habitat and extinction in the wild The Potosi pupfish is endemic to a clear spring-fed pool in an endorheic basin known as 'La Hediondilla' near the foot of Cerro Potosi. The pool had a maximum depth of 2.5 meters, and surface area of 10,000 m2, covered by abundant vegetation including ''Ceratophyllum, Najas, Nasturtium,'' and ''Utricularia.'' Sparse clumps of ''Typha'' and ''Scirpus'' were also present in the spring. A large earthen and rock dam enlarged the original pool, and a series of seeps and secondary outflows created ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American 3000 M Summits
North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' is related to the Old High German ''nord'', both descending from the Proto-Indo-European unit *''ner-'', meaning "left; below" as north is to left when facing the rising sun. Similarly, the other cardinal directions are also related to the sun's position. The Latin word ''borealis'' comes from the Greek '' boreas'' "north wind, north", which, according to Ovid, was personified as the wind-god Boreas, the father of Calais and Zetes. ''Septentrionalis'' is from ''septentriones'', "the seven plow oxen", a name of ''Ursa Major''. The Greek ἀρκτικός (''arktikós'') is named for the same constellation, and is the source of the English word ''Arctic''. Other languages have other derivations. For example, in Lezgian, ''kefer'' can mean b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Nuevo León
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of Mexico
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least on topographic prominence. All summits in this article have at least 500 meters of topographic prominence. An ultra-prominent summit is a summit with at least of topographic prominence. of Mexico. The summit of a mountain or hill may be measured in three principal ways: #The topographic elevation of a summit measures the height on the summit above a geodetic sea level.If the elevation or prominence of a summit is calculated as a range of values, the arithmetic mean is shown. The first table below ranks the 40 highest major summits of México by elevation. #The topographic prominence of a summit is a measure of how high the summit rises above its surroundings.The topographic prominence of a summit is the topographic elevation difference between the summit and its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Ultras Of Mexico
The following sortable table comprises the 26 ultra-prominent summits of México. Each of these peaks has at least of topographic prominence.This article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. An ultra-prominent summit is a summit with at least of topographic prominence. The summit of a mountain or hill may be measured in three principal ways: #The topographic elevation of a summit measures the height of the summit above a geodetic sea level.If the elevation or prominence of a summit is calculated as a range of values, the arithmetic mean is shown. #The topographic prominence of a summit is a measure of how high the summit rises above its surroundings.The topographic prominence of a summit is the topographic elevation difference between the summit and its highest or key col to a higher summit. The summit may be near its key col or quite far away. The key ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Peaks Of North America
This article comprises three sortable tables of Summit, major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All summits in this article have at least 500 meters of topographic prominence. An Ultra-prominent peak, ultra-prominent summit is a summit with at least of topographic prominence. of North America, greater North America.This article defines North America, greater North America as the portion of the Continent, continental landmass of the Americas extending westward and northward from the Isthmus of Panama plus the Island, ocean islands surrounding that landmass. This article defines the ocean islands of greater North America to include the Island#Continental islands, coastal islands of Geography of North America, North America, the Caribbean, islands of the Caribbean Sea, the Lucayan Archipelago, the List of islands of Greenland, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Peaks Of México
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least on topographic prominence. All summits in this article have at least 500 meters of topographic prominence. An ultra-prominent summit is a summit with at least of topographic prominence. of Mexico. The summit of a mountain or hill may be measured in three principal ways: #The topographic elevation of a summit measures the height on the summit above a geodetic sea level.If the elevation or prominence of a summit is calculated as a range of values, the arithmetic mean is shown. The first table below ranks the 40 highest major summits of México by elevation. #The topographic prominence of a summit is a measure of how high the summit rises above its surroundings.The topographic prominence of a summit is the topographic elevation difference between the summit and its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuenca Alimentadora Del Distrito Nacional De Riego 026 Bajo Río San Juan
The Cuenca Alimentadora del Distrito Nacional de Riego 026 Bajo Río San Juan is a protected area in northeastern Mexico. It extends over part of the northern Sierra Madre Occidental, near the cities of Monterrey and Saltillo. Geography The protected area covers an area of 1971.57 km2, which includes much of the northern Sierra Madre Oriental. It adjoins Cumbres de Monterrey National Park to the north, Serranía de Zapalinamé ecological reserve to the west, and Cerro el Potosí ecological reserve on the southeast. The protected area protects the headwaters of the San Juan River, which supplies water to the Monterrey Metropolitan Area, Mexico's second most populous, and the agricultural lower Rio Grande valley. Flora and fauna The natural vegetation is pine–oak forest at higher elevations. pines and/or oaks are the dominant trees, forming dense forests or open woodlands. There are also groves of oyamel fir ('' Abies vejarii'') and Mexican Douglas-fir ''Pseudotsuga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave Radio Relay
Microwave transmission is the transmission of information by electromagnetic waves with wavelengths in the microwave frequency range of 300MHz to 300GHz(1 m - 1 mm wavelength) of the electromagnetic spectrum. Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay network. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter, but such systems are expensive and generally used only in specialist roles. Although an experimental microwave telecommunication link across the English Channel was demonstrated in 1931, the development of radar in World War II provided the technology for practical exploitation of microwave communication. During the war, the British Army introduced the Wireless Set No. 10, which used microwave relays to multiplex eight telephone channels over long distances. A link across the English Channel allow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave
Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively. Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands. A more common definition in radio-frequency engineering is the range between 1 and 100 GHz (wavelengths between 0.3 m and 3 mm). In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum. Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, Ku, K, or Ka band, or by similar NATO or EU designations. The prefix ' in ''microwave'' is not meant to suggest a wavelength in the micrometer range. Rather, it indicates that microwaves are "small" (having shorter wavelengths), compared to the radio waves used prior to microwave te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct In The Wild
A species that is extinct in the wild (EW) is one that has been categorized by the International Union for Conservation of Nature as known only by living members kept in captivity or as a naturalized population outside its historic range due to massive habitat loss. Examples Examples of species and subspecies that are extinct in the wild include: *Alagoas curassow (last unconfirmed sighting reported in the late 1980s, listed extinct in the wild since 1994) *Beloribitsa * Cachorrito de charco palmal (last seen in 1994, listed extinct in the wild since 1996) * Christmas Island blue-tailed skink (listed extinct in the wild since 2014) *Dabry's sturgeon (listed extinct in the wild since 2022) * Escarpment cycad (listed extinct in the wild since 2006) *Franklinia (last seen in 1803, listed extinct in the wild since 1998) *Golden skiffia (listed extinct in the wild since 1996) *Guam kingfisher (listed extinct in the wild since 1986) *Hawaiian crow or ʻalalā (last seen in 2002, li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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