50-479: The Tsingy Rouge ( Red Tsingy ) is a stone formation of red laterite formed by erosion of the Irodo River in the region of Diana in northern Madagascar . It is situated approximately 60 km south of Antsiranana near the town of Sadjoavato . 12°38′20″S 49°29′50″E / 12.63889°S 49.49722°E / -12.63889; 49.49722 This Diana Region of Madagascar location article
100-500: A flying golden ram. The name, however, is probably derived from an older language, such as Pelasgian , which was unknown to those who explained its origin. In his Names on the Globe , George R. Stewart theorizes that Hellespont originally meant something like 'narrow Pontus' or 'entrance to Pontus', Pontus being an ancient name for the region around the Black Sea , and by extension, for
150-507: A pioneer of the study of karst in Slovenia and a fellow of the Royal Society , London, introduced the word karst to European scholars in 1689 to describe the phenomenon of underground flows of rivers in his account of Lake Cerknica . Jovan Cvijić greatly advanced the knowledge of karst regions to the point where he became known as the "father of karst geomorphology". Primarily discussing
200-562: A proper noun, the Slovene form Grast was first attested in 1177. Ultimately, the word is of Mediterranean origin. It has also been suggested that the word may derive from the Proto-Indo-European root karra- 'rock'. The name may also be connected to the oronym Kar(u)sádios oros cited by Ptolemy , and perhaps also to Latin Carusardius . Johann Weikhard von Valvasor ,
250-401: A sport than a science and so the underground karst caves and their associated watercourses were, from a scientific perspective, understudied. Karst is most strongly developed in dense carbonate rock , such as limestone, that is thinly bedded and highly fractured . Karst is not typically well developed in chalk , because chalk is highly porous rather than dense, so the flow of groundwater
300-399: A toponym, its specific language, its pronunciation, and its origins and meaning are all important facts to be recorded during name surveys. Scholars have found that toponyms provide valuable insight into the historical geography of a particular region. In 1954, F. M. Powicke said of place-name study that it "uses, enriches and tests the discoveries of archaeology and history and the rules of
350-516: A variety of spatial and temporal scales in karst regions, with the purpose of understanding karst aquifers and ecosystems, and the development of the surface and underground structure, so that the environment can be protected and human activities planned effectively. Oronym (toponymy) Toponymy , toponymics , or toponomastics is the study of toponyms ( proper names of places, also known as place names and geographic names ), including their origins, meanings, usage and types. Toponym
400-519: A well in a fracture trace or intersection of fracture traces increases the likelihood to encounter good water production. Voids in karst aquifers can be large enough to cause destructive collapse or subsidence of the ground surface that can initiate a catastrophic release of contaminants. Groundwater flow rate in karst aquifers is much more rapid than in porous aquifers. For example, in the Barton Springs Edwards aquifer, dye traces measured
450-633: A wide variety of formats, including hard-copy topographic maps as well as digital formats such as geographic information systems , Google Maps , or thesauri like the Getty Thesaurus of Geographic Names . In 2002, the United Nations Conference on the Standardization of Geographical Names acknowledged that while common, the practice of naming geographical places after living persons (toponymic commemoration) could be problematic. Therefore,
500-439: Is a stub . You can help Misplaced Pages by expanding it . Karst Karst ( / k ɑːr s t / ) is a topography formed from the dissolution of soluble carbonate rocks such as limestone and dolomite . It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. There is some evidence that karst may occur in more weathering -resistant rocks such as quartzite given
550-493: Is a UNESCO World Heritage Site. Many karst-related terms derive from South Slavic languages , entering scientific vocabulary through early research in the Western Balkan Dinaric Alpine karst. The study of the various aspects of karst regions is called karstology. This includes biological, chemical, ecological, geomorphological, hydrogeological, hydrological, political, socio-economical, and other processes over
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#1732876533418600-542: Is a development of karst observed in geological history and preserved within the rock sequence, effectively a fossil karst. There are for example palaeokarst surfaces exposed within the Clydach Valley Subgroup of the Carboniferous Limestone sequence of South Wales which developed as sub-aerial weathering of recently formed limestones took place during periods of non-deposition within the early part of
650-525: Is a karst landscape which is developed beneath a cover of insoluble rocks. Typically this will involve a cover of sandstone overlying limestone strata undergoing solution. In the United Kingdom for example extensive doline fields have developed at Cefn yr Ystrad , Mynydd Llangatwg and Mynydd Llangynidr in South Wales across a cover of Twrch Sandstone which overlies concealed Carboniferous Limestone ,
700-627: Is called toponymist . The term toponymy comes from Ancient Greek : τόπος / tópos , 'place', and ὄνομα / onoma , 'name'. The Oxford English Dictionary records toponymy (meaning "place name") first appearing in English in 1876. Since then, toponym has come to replace the term place-name in professional discourse among geographers . Toponyms can be divided in two principal groups: Various types of geographical toponyms (geonyms) include, in alphabetical order: Various types of cosmographical toponyms (cosmonyms) include: Probably
750-468: Is developed in areas where salt is undergoing solution underground. It can lead to surface depressions and collapses which present a geo-hazard. Karst areas tend to have unique types of forests. The karst terrain is difficult for humans to traverse, so that their ecosystems are often relatively undisturbed. The soil tends to have a high pH, which encourages growth of unusual species of orchids, palms, mangroves, and other plants. Paleokarst or palaeokarst
800-612: Is frequently unseen until the roof of a cavern suddenly collapses. Such events have swallowed homes, cattle, cars, and farm machinery. In the United States, sudden collapse of such a cavern-sinkhole swallowed part of the collection of the National Corvette Museum in Bowling Green, Kentucky in 2014. The world's largest limestone karst is Australia's Nullarbor Plain . Slovenia has the world's highest risk of sinkholes, while
850-407: Is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock , and much of this is found in porous karst systems. The English word karst was borrowed from German Karst in the late 19th century, which entered German usage much earlier, to describe a number of geological, geomorphological, and hydrological features found within
900-399: Is not concentrated along fractures. Karst is also most strongly developed where the water table is relatively low, such as in uplands with entrenched valleys , and where rainfall is moderate to heavy. This contributes to rapid downward movement of groundwater, which promotes dissolution of the bedrock, whereas standing groundwater becomes saturated with carbonate minerals and ceases to dissolve
950-611: Is the following: In very rare conditions, oxidation can play a role. Oxidation played a major role in the formation of ancient Lechuguilla Cave in the US state of New Mexico and is presently active in the Frasassi Caves of Italy. The oxidation of sulfides leading to the formation of sulfuric acid can also be one of the corrosion factors in karst formation. As oxygen (O 2 )-rich surface waters seep into deep anoxic karst systems, they bring oxygen, which reacts with sulfide present in
1000-449: Is the general term for a proper name of any geographical feature , and full scope of the term also includes proper names of all cosmographical features. In a more specific sense, the term toponymy refers to an inventory of toponyms, while the discipline researching such names is referred to as toponymics or toponomastics . Toponymy is a branch of onomastics , the study of proper names of all kinds. A person who studies toponymy
1050-525: The Persian Gulf naming dispute . On 20 September 1996 a note on the internet reflected a query by a Canadian surfer, who said as follows: 'One producer of maps labeled the water body "Persian Gulf" on a 1977 map of Iran, and then "Arabian Gulf", also in 1977, in a map which focused on the Gulf States . I would gather that this is an indication of the "politics of maps", but I would be interested to know if this
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#17328765334181100-505: The United Nations Group of Experts on Geographical Names recommends that it be avoided and that national authorities should set their own guidelines as to the time required after a person's death for the use of a commemorative name. In the same vein, writers Pinchevski and Torgovnik (2002) consider the naming of streets as a political act in which holders of the legitimate monopoly to name aspire to engrave their ideological views in
1150-542: The dissolution of the Soviet Union . After 1830, in the wake of the Greek War of Independence and the establishment of an independent Greek state, Turkish, Slavic and Italian place names were Hellenized, as an effort of "toponymic cleansing." This nationalization of place names can also manifest itself in a postcolonial context. In Canada, there have been initiatives in recent years " to restore traditional names to reflect
1200-479: The philologists ." Toponyms not only illustrate ethnic settlement patterns, but they can also help identify discrete periods of immigration. Toponymists are responsible for the active preservation of their region's culture through its toponymy. They typically ensure the ongoing development of a geographical names database and associated publications, for recording and disseminating authoritative hard-copy and digital toponymic data. This data may be disseminated in
1250-626: The range of the Dinaric Alps , stretching from the northeastern corner of Italy above the city of Trieste , across the Balkan peninsula along the coast of the eastern Adriatic to Kosovo and North Macedonia , where the massif of the Šar Mountains begins. The karst zone is at the northwesternmost section, described in early topographical research as a plateau between Italy and Slovenia . Languages preserving this form include Italian : Carso , German : Karst , and Albanian : karsti . In
1300-550: The Indigenous culture wherever possible ". Indigenous mapping is a process that can include restoring place names by Indigenous communities themselves. Frictions sometimes arise between countries because of toponymy, as illustrated by the Macedonia naming dispute in which Greece has claimed the name Macedonia , the Sea of Japan naming dispute between Japan and Korea , as well as
1350-511: The bedrock. The carbonic acid that causes karst features is formed as rain passes through Earth's atmosphere picking up carbon dioxide (CO 2 ), which readily dissolves in the water. Once the rain reaches the ground, it may pass through soil that provides additional CO 2 produced by soil respiration . Some of the dissolved carbon dioxide reacts with the water to form a weak carbonic acid solution, which dissolves calcium carbonate . The primary reaction sequence in limestone dissolution
1400-450: The complexity of karst aquifers, and need to be supplemented with dye traces , measurement of spring discharges, and analysis of water chemistry. U.S. Geological Survey dye tracing has determined that conventional groundwater models that assume a uniform distribution of porosity are not applicable for karst aquifers. Linear alignment of surface features such as straight stream segments and sinkholes develop along fracture traces . Locating
1450-531: The first toponymists were the storytellers and poets who explained the origin of specific place names as part of their tales; sometimes place-names served as the basis for their etiological legends. The process of folk etymology usually took over, whereby a false meaning was extracted from a name based on its structure or sounds. Thus, for example, the toponym of Hellespont was explained by Greek poets as being named after Helle , daughter of Athamas , who drowned there as she crossed it with her brother Phrixus on
1500-557: The fissures. The enlarged fissures allow a larger quantity of water to enter which leads to a progressive enlargement of openings. Abundant small openings store a large quantity of water. The larger openings form a conduit system that drains the aquifer to springs. Characterization of karst aquifers requires field exploration to locate sinkholes, swallets , sinking streams , and springs in addition to studying geologic maps . Conventional hydrogeologic methods such as aquifer tests and potentiometric mapping are insufficient to characterize
1550-466: The global demand for drinkable water. Farming in karst areas must take into account the lack of surface water. The soils may be fertile enough, and rainfall may be adequate, but rainwater quickly moves through the crevices into the ground, sometimes leaving the surface soil parched between rains. The karst topography also poses peculiar difficulties for human inhabitants. Sinkholes can develop gradually as surface openings enlarge, but progressive erosion
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1600-456: The karst groundwater flow rates from 0.5 to 7 miles per day (0.8 to 11.3 km/d). The rapid groundwater flow rates make karst aquifers much more sensitive to groundwater contamination than porous aquifers. Groundwater in karst areas is also just as easily polluted as surface streams, because Karst formations are cavernous and highly permeable, resulting in reduced opportunity for contaminant filtration. Well water may also be unsafe as
1650-525: The karst regions of the Balkans, Cvijić's 1893 publication Das Karstphänomen describes landforms such as karren, dolines and poljes . In a 1918 publication, Cvijić proposed a cyclical model for karst landscape development. Karst hydrology emerged as a discipline in the late 1950s and the early 1960s in France. Previously, the activities of cave explorers, called speleologists , had been dismissed as more of
1700-552: The last-named locality having been declared a site of special scientific interest in respect of it. Kegelkarst is a type of tropical karst terrain with numerous cone-like hills, formed by cockpits, mogotes , and poljes and without strong fluvial erosion processes. This terrain is found in Cuba, Jamaica, Indonesia, Malaysia, the Philippines, Puerto Rico, southern China, Myanmar, Thailand, Laos and Vietnam. Salt karst (or 'halite karst')
1750-412: The local South Slavic languages , all variations of the word are derived from a Romanized Illyrian base (yielding Latin : carsus , Dalmatian : carsus ), later metathesized from the reconstructed form * korsъ into forms such as Slovene : kras and Serbo-Croatian : krš , kras , first attested in the 18th century, and the adjective form kraški in the 16th century. As
1800-637: The most dramatic of these formations can be seen in Thailand 's Phangnga Bay and at Halong Bay in Vietnam . Calcium carbonate dissolved into water may precipitate out where the water discharges some of its dissolved carbon dioxide. Rivers which emerge from springs may produce tufa terraces, consisting of layers of calcite deposited over extended periods of time. In caves, a variety of features collectively called speleothems are formed by deposition of calcium carbonate and other dissolved minerals. Interstratal karst
1850-626: The most useful geographical reference system in the world. Consistency and accuracy are essential in referring to a place to prevent confusion in everyday business and recreation. A toponymist, through well-established local principles and procedures developed in cooperation and consultation with the United Nations Group of Experts on Geographical Names (UNGEGN), applies the science of toponymy to establish officially recognized geographical names. A toponymist relies not only on maps and local histories, but interviews with local residents to determine names with established local usage. The exact application of
1900-414: The new map to specify the detailed topographical portrayal and after consulting with and authorization of messr. Theodor von Heuglin and count Karl Graf von Waldburg-Zeil I have entered 118 names in the map: partly they are the names derived from celebrities of arctic explorations and discoveries, arctic travellers anyway as well as excellent friends, patrons, and participants of different nationalities in
1950-466: The newest northpolar expeditions, partly eminent German travellers in Africa, Australia, America ...". Toponyms may have different names through time, due to changes and developments in languages, political developments and border adjustments to name but a few. More recently many postcolonial countries revert to their own nomenclature for toponyms that have been named by colonial powers. Place names provide
2000-704: The period. Sedimentation resumed and further limestone strata were deposited on an irregular karst surface, the cycle recurring several times in connection with fluctuating sea levels over prolonged periods. Pseudokarsts are similar in form or appearance to karst features but are created by different mechanisms. Examples include lava caves and granite tors —for example, Labertouche Cave in Victoria, Australia —and paleocollapse features. Mud Caves are an example of pseudokarst. Karst formations have unique hydrology, resulting in many unusual features. A karst fenster (karst window) occurs when an underground stream emerges onto
2050-418: The right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. In regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of paleokarst (buried karst in the stratigraphic column )
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2100-757: The river flows into a cave in a formation known as the Madison Limestone and then rises again 800 m ( 1 ⁄ 2 mi) down the canyon in a placid pool. A turlough is a unique type of seasonal lake found in Irish karst areas which are formed through the annual welling-up of water from the underground water system. Main Article Aquifer#Karst Karst aquifers typically develop in limestone . Surface water containing natural carbonic acid moves down into small fissures in limestone. This carbonic acid gradually dissolves limestone thereby enlarging
2150-441: The sea itself. Especially in the 19th century, the age of exploration, a lot of toponyms got a different name because of national pride. Thus the famous German cartographer Petermann thought that the naming of newly discovered physical features was one of the privileges of a map-editor, especially as he was fed up with forever encountering toponyms like 'Victoria', 'Wellington', 'Smith', 'Jones', etc. He writes: "While constructing
2200-440: The social space. Similarly, the revisionist practice of renaming streets , as both the celebration of triumph and the repudiation of the old regime is another issue of toponymy. Also, in the context of Slavic nationalism , the name of Saint Petersburg was changed to the more Slavic sounding Petrograd from 1914 to 1924, then to Leningrad following the death of Vladimir Lenin and back to Saint-Peterburg in 1991 following
2250-625: The surface between layers of rock, cascades some distance, and then disappears back down, often into a sinkhole. Rivers in karst areas may disappear underground a number of times and spring up again in different places, even under a different name, like Ljubljanica , the "river of seven names". Another example of this is the Popo Agie River in Fremont County, Wyoming , where, at a site named "The Sinks" in Sinks Canyon State Park ,
2300-415: The surface, complex underground drainage systems (such as karst aquifers ) and extensive caves and cavern systems may form. Erosion along limestone shores, notably in the tropics , produces karst topography that includes a sharp makatea surface above the normal reach of the sea, and undercuts that are mostly the result of biological activity or bioerosion at or a little above mean sea level . Some of
2350-1002: The system ( pyrite or hydrogen sulfide ) to form sulfuric acid (H 2 SO 4 ). Sulfuric acid then reacts with calcium carbonate, causing increased erosion within the limestone formation. This chain of reactions is: This reaction chain forms gypsum . The karstification of a landscape may result in a variety of large- or small-scale features both on the surface and beneath. On exposed surfaces, small features may include solution flutes (or rillenkarren), runnels , limestone pavement (clints and grikes), kamenitzas collectively called karren or lapiez. Medium-sized surface features may include sinkholes or cenotes (closed basins), vertical shafts, foibe (inverted funnel shaped sinkholes), disappearing streams, and reappearing springs . Large-scale features may include limestone pavements , poljes , and karst valleys. Mature karst landscapes, where more bedrock has been removed than remains, may result in karst towers , or haystack/eggbox landscapes. Beneath
2400-461: The water may have run unimpeded from a sinkhole in a cattle pasture, bypassing the normal filtering that occurs in a porous aquifer . Sinkholes have often been used as farmstead or community trash dumps . Overloaded or malfunctioning septic tanks in karst landscapes may dump raw sewage directly into underground channels. Geologists are concerned with these negative effects of human activity on karst hydrology which, as of 2007 , supplied about 25% of
2450-507: The western Highland Rim in the eastern United States is at the second-highest risk of karst sinkholes. In Canada, Wood Buffalo National Park , Northwest Territories contains areas of karst sinkholes. Mexico hosts important karst regions in the Yucatán Peninsula and Chiapas . The West of Ireland is home to The Burren , a karst limestone area. The South China Karst in the provinces of Guizhou , Guangxi , and Yunnan provinces
2500-451: Was done to avoid upsetting users of the Iran map and users of the map showing Arab Gulf States'. This symbolizes a further aspect of the topic, namely the spilling over of the problem from the purely political to the economic sphere. A geographic names board is an official body established by a government to decide on official names for geographical areas and features. Most countries have such
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