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Sistema Dos Ojos
Dos Ojos (from Spanish language, Spanish meaning "Two Eyes"; officially Sistema Dos Ojos) is part of a flooded cave system located north of Tulum, on the Caribbean coast of the Yucatán Peninsula, in the state of Quintana Roo, Mexico. The exploration of Dos Ojos began in 1987 and still continues. The surveyed extent of the cave system is and there are 28 known sinkhole entrances, which are locally called cenotes. In January 2018, a connection was found between Sistema Dos Ojos and Sistema Sac Actun. The smaller Dos Ojos became a part of Sac Actun, making the Sistema Sac Actun the longest known underwater cave system in the world. Dos Ojos lies north of the rest of the Sac Actun cave system. As a separate system, Dos Ojos remained in the top ten, if not the top three, longest underwater cave systems in the world since the late 1980s. Dos Ojos contains the deepest known cave passage in Quintana Roo with of depth located at "The Pit" discovered in 1996 by Cave diving, cave explorers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quintana Roo
Quintana Roo ( , ), officially the Free and Sovereign State of Quintana Roo ( es, Estado Libre y Soberano de Quintana Roo), is one of the 31 states which, with Mexico City, constitute the 32 federal entities of Mexico. It is divided into 11 municipalities and its capital city is Chetumal. Quintana Roo is located on the eastern part of the Yucatán Peninsula and is bordered by the states of Campeche to the west and Yucatán to the northwest, and by the Orange Walk and Corozal districts of Belize, along with an offshore borderline with Belize District to the south. As Mexico's easternmost state, Quintana Roo has a coastline to the east with the Caribbean Sea and to the north with the Gulf of Mexico. The state previously covered and shared a small border with Guatemala in the southwest of the state. However, in 2013, Mexico's Supreme Court of Justice of the Nation resolved the boundary dispute between Quintana Roo, Campeche, and Yucatán stemming from the creation of the C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xel-Ha Park
Xelha (, Spanish: Xelhá; sometimes pronounced "chel-ha"; Yucatec Maya: Xel-Há) is an archaeological site of the Maya civilization from pre-Columbian Mesoamerica, located on the eastern coastline of the Yucatán Peninsula, in the present-day state of Quintana Roo, Mexico. The etymology of the site's name comes from Yukatek Maya, combining the roots ''xel'' ("spring") and ''ha''' ("water"). The lagoon and inlet at Xelha has been turned into a commercial water theme park known as Xel-Ha Park. History The site of Xelha is located south of the modern township of Playa del Carmen, in the state of Quintana Roo, Mexico. The evidence is inconclusive concerning a founding date for Xel-Ha, but it was occupied by the 1st Century and active during Classic and Postclassic times, with most of the buildings being rebuilt in the Late Postclassic. It was probably not fully abandoned until the 19th Century. A stela with an Early Classic date of 9.6.10.0.0 (AD 564) from Xel-Ha was discove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinkholes Of Mexico
A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openings where surface water enters into underground passages known as ''ponor'', swallow hole or swallet. A ''cenote'' is a type of sinkhole that exposes groundwater underneath. A ''sink'' or ''stream sink'' are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock. Most sinkholes are caused by karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. Sinkholes are usually circular and vary in size from tens to hundreds of meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. Formation Natural processes Sinkholes may capture su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone Caves
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limestone c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Quintana Roo
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of Mexico
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. Caves which extend further underground than the opening is wide are called ''endogene'' caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as '' speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorganis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sistema Sac Actun And Sistema Dos Ojos
AFK Sistema PAO is a large Russian conglomerate company, founded by Vladimir Yevtushenkov, who was chairman of the corporation's board of directors until 2022. In April, Yevtushenkov's shareholding in Sistema has decreased to 49.2%, and he also stepped down from Sistema's board. Sistema has its headquarters in Moscow. The company's global depository receipts (GDRs) are traded on the London Stock Exchange (ticker symbol ). History In 1993, Evgeny Novitsky and Vladimir Yevtushenkov founded the holding company AFK Sistema, also known as Sistema JSFC, to group together several information technology (IT) and cell phone companies including MTS. Structure Sistema operates a number of consumer service businesses in the areas of: * IT and telecoms — Mobile TeleSystems, Moscow City Telephone Network, SkyLink, Sitronics (formerly known as 'Science Center Concern'), NIIME, Mikron, STROM telecom. * Banking — MTS Bank * E-commerce – Ozon * House-Building and Real Estate — Sistem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinness World Record
''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book published annually, listing world records both of human achievements and the extremes of the natural world. The brainchild of Sir Hugh Beaver, the book was co-founded by twin brothers Norris and Ross McWhirter in Fleet Street, London, in August 1955. The first edition topped the best-seller list in the United Kingdom by Christmas 1955. The following year the book was launched internationally, and as of the 2022 edition, it is now in its 67th year of publication, published in 100 countries and 23 languages, and maintains over 53,000 records in its database. The international franchise has extended beyond print to include television series and museums. The popularity of the franchise has resulted in ''Guinness World Records'' becoming the primary international authority ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freedive
Freediving, free-diving, free diving, breath-hold diving, or skin diving is a form of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear. Besides the limits of breath-hold, immersion in water and exposure to high ambient pressure also have physiological effects that limit the depths and duration possible in freediving. Examples of freediving activities are traditional fishing techniques, competitive and non-competitive freediving, competitive and non-competitive spearfishing and freediving photography, synchronised swimming, underwater football, underwater rugby, underwater hockey, underwater target shooting and snorkeling. There are also a range of "competitive apnea" disciplines; in which competitors attempt to attain great depths, times, or distances on a single breath. Historically, the term ''free diving'' was also used to refer to scuba diving, due to the freedom of movement compared with surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carlos Coste
Carlos Coste (born in Caracas, Venezuela, on February 2, 1976) is a Venezuelan professional free-diver. He started his training in apnea and Free-diving in 1996, and got his first national record in 1998. In October 2002 he broke his 1st Official World Record (actually 2x WR in one week: FIM -93m and CWT -90m). In October 2003, he became the first human to achieve a Free Immersion dive of more than 100 meters (-101m, Venezuela 2003), certified by AIDA World Record and Guinness World Records. He also was the first freediver to pass 100 meters in constant weight, reaching a 102 meter immersion in Cyprus 2004. Coste became First AIDA Depth Individual World Champion. He won the World Championship making a new World Record in Constant Weight -105m, celebrated in Nice, 2005. He broke the AIDA (International Association for the Development of Apnea) world record for variable weight free-diving, with a 140 meter immersion in the Red Sea, Egypt, on May 9, 2006. This record was superseded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavern Diving
Cave-diving is underwater diving in water-filled caves. It may be done as an extreme sport, a way of exploring flooded caves for scientific investigation, or for the search for and recovery of divers or, as in the 2018 Thai cave rescue, other cave users. The equipment used varies depending on the circumstances, and ranges from breath hold to surface supplied, but almost all cave-diving is done using scuba equipment, often in specialised configurations with redundancies such as sidemount or backmounted twinset. Recreational cave-diving is generally considered to be a type of technical diving due to the lack of a free surface during large parts of the dive, and often involves planned decompression stops. A distinction is made by recreational diver training agencies between cave-diving and cavern-diving, where cavern diving is deemed to be diving in those parts of a cave where the exit to open water can be seen by natural light. An arbitrary distance limit to the open water sur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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