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Helictites
A helictite is a speleothem (cave-formed mineral) found in a limestone cave that changes its axis from the vertical at one or more stages during its growth. Helictites have a curving or angular form that looks as if they were grown in zero gravity. They are most likely the result of capillary forces acting on tiny water droplets, a force often strong enough at this scale to defy gravity. Helictites are, perhaps, the most delicate of cave formations. They are usually made of needle-form calcite and aragonite. Helictite forms have been described in several types: ribbon helictites, saws, rods, butterflies, "hands", curly-fries, and "clumps of worms". They typically have radial symmetry. They can be easily crushed or broken by the slightest touch. Because of this, helictites are rarely seen within arm's reach in tourist caves. Timpanogos Cave National Monument in Utah has one of the largest collections of these formations in the world. Large numbers are also in the Jenolan Cave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helictites At Jenolan Caves
A helictite is a speleothem (cave-formed mineral) found in a limestone cave that changes its axis from the vertical at one or more stages during its growth. Helictites have a curving or angular form that looks as if they were grown in zero gravity. They are most likely the result of capillary forces acting on tiny water droplets, a force often strong enough at this scale to defy gravity. Helictites are, perhaps, the most delicate of cave formations. They are usually made of needle-form calcite and aragonite. Helictite forms have been described in several types: ribbon helictites, saws, rods, butterflies, "hands", curly-fries, and "clumps of worms". They typically have radial symmetry. They can be easily crushed or broken by the slightest touch. Because of this, helictites are rarely seen within arm's reach in tourist caves. Timpanogos Cave National Monument in Utah has one of the largest collections of these formations in the world. Large numbers are also in the Jenolan Caves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helictite At Treak Cavern (close Up)
A helictite is a speleothem (cave-formed mineral) found in a limestone cave that changes its axis from the vertical at one or more stages during its growth. Helictites have a curving or angular form that looks as if they were grown in zero gravity. They are most likely the result of capillary forces acting on tiny water droplets, a force often strong enough at this scale to defy gravity. Helictites are, perhaps, the most delicate of cave formations. They are usually made of needle-form calcite and aragonite. Helictite forms have been described in several types: ribbon helictites, saws, rods, butterflies, "hands", curly-fries, and "clumps of worms". They typically have radial symmetry. They can be easily crushed or broken by the slightest touch. Because of this, helictites are rarely seen within arm's reach in tourist caves. Timpanogos Cave National Monument in Utah has one of the largest collections of these formations in the world. Large numbers are also in the Jenolan Caves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthodite
Anthodites (Greek ἄνθος ''ánthos'', "flower", ''-ode'', adjectival combining form, ''-ite'' adjectival suffix) are speleothems (cave formations) composed of long needle-like crystals situated in clusters which radiate outward from a common base. The "needles" may be quill-like or feathery. Most anthodites are made of the mineral aragonite (a variety of calcium carbonate, CaCO3), although some are composed of gypsum (CaSO4·2H2O). The term ''anthodite'' is first cited in the scientific literature in 1965 by Japanese researcher N. Kashima, who described "flower-like dripstone" composed of "an alternation of calcite and aragonite". Structure, composition and appearance The individual crystals of anthodites develop in a form described as "acicular" (needle-like) and often branch out as they grow. They usually grow downward from a cave's ceiling. Aragonite crystals are contrasted with those made of calcite (another variety of calcium carbonate) in that the latter tend to be s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jenolan Caves
The Jenolan Caves (Tharawal language, Tharawal: ''Binoomea'', ''Bindo'', ''Binda'') are limestone cave, limestone caves located within the Jenolan Karst Conservation Reserve in the Central Tablelands region, west of the Blue Mountains (New South Wales), Blue Mountains, in Jenolan, New South Wales, Jenolan, Oberon Council, New South Wales, in eastern Australia. The caves and reserve are situated approximately west of Sydney, east of and west of Katoomba, New South Wales, Katoomba ( by road). The caves are the most visited of several similar groups in the limestone caves of the country, and the most ancient discovered open caves in the world. They include numerous Silurian marine fossils and the calcite formations, sometimes pure white, are noted for their beauty. The cave network follows the watercourse, course of a Subterranea (geography), subterranean section of the Jenolan River. It has more than of multi-level passages and over 300 entrances. The complex is still being e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speleothem
A speleothem (; ) is a geological formation by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, depending on their depositional history and environment. Their chemical composition, gradual growth, and preservation in caves make them useful paleoclimatic proxies. Chemical and physical characteristics More than 300 variations of cave mineral deposits have been identified. The vast majority of speleothems are calcareous, composed of calcium carbonate (CaCO3) minerals (calcite or aragonite). Less commonly, speleothems are made of calcium sulfate (gypsum or mirabilite) or opal. Speleothems of pure calcium carbonate or calcium sulfate are translucent and colorless. The presence of iron oxide or copper provides a reddish brown color. The presence of manganese oxide can create darker colors such as black or dark brown. Speleothems can also be brown d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stalactite
A stalactite (, ; from the Greek 'stalaktos' ('dripping') via ''stalassein'' ('to drip') is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble and that can be deposited as a colloid, or is in suspension, or is capable of being melted, may form a stalactite. Stalactites may be composed of lava, minerals, mud, peat, pitch, sand, sinter, and amberat (crystallized urine of pack rats). A stalactite is not necessarily a speleothem, though speleothems are the most common form of stalactite because of the abundance of limestone caves. The corresponding formation on the floor of the cave is known as a stalagmite. Mnemonics have been developed for which word refers to which type of formation; one is that ''stalactite'' has a C for "ceiling", and ''stalagmite'' has a G for "ground". Another example is that ''stalactites'' "hang on ''T''ight" and ''stalagmites'' "''M''ight grow up" †... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wyandotte Cave8
Wyandotte may refer to: People and culture * Wyandotte Nation (also Wyandot), a federally recognized Native American tribe in Oklahoma * Wyandot language, the extinct language, now under revitalization efforts, of the Wyandotte Nation United States geographic names * Wyandotte, Arkansas, an historical community in Hot Spring County, Arkansas * Wyandotte, California * Wyandotte, Indiana * Wyandotte, Kansas, a mid-19th-century settlement and neighborhood of Kansas City, Kansas; see Kansas Pacific Railway * Wyandotte, Louisville, Kentucky, a neighborhood * Wyandotte, Michigan * Wyandotte, Oklahoma * Wyandotte Caves, park and its caverns in southern Indiana * Wyandotte County, Kansas * Wyandotte Township, Pennington County, Minnesota Other * ''Wyandotté'' (novel), by James Fenimore Cooper * Wyandotte chicken, a breed See also * Huron (other) * Huron-Wendat (other) * Wendat (other) ''Wendat'' is an alternate spelling of ''Wyandot'' and ''Wyand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karrantza
Karrantza Harana/Valle de Carranza (in Basque ''Karrantza Harana'', in Spanish ''Valle de Carranza''), is a town and municipality located in the province of Biscay, in the Basque Country. It is located in the comarca of Enkarterri and it is the westernmost and largest (by area) municipality of the province. Film director VÃctor Erice was born there. Etymology The first recorded appearance of the toponym of Carranza is on the Chronicle of Alfonso III, dated in the 10th Century, where it appears as ''Carrantia''. According to the text, ''Carrantia'' was one of the towns known to be populated during the reign of Alfonso I, King of Asturias. The origin of ''Carrantia'' comes from the Cantabrian dialect, meaning "high rocks". From ''Carrantia'' it would evolve to Carranza, the current Spanish toponym. ''Karrantza'' is the Basque toponym, an adaptation of Carranza following the Basque orthographic rules, and it is the official name of the municipality since 2001. History The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timpanogos Cave National Monument
Timpanogos Cave National Monument is a United States National Monument protecting the Timpanogos Cave Historic District and a cave system on Mount Timpanogos in American Fork Canyon in the Wasatch Range, near Highland, Utah, in the United States. The site is managed by the National Park Service. The trail to the cave is steep, gaining close to , but paved and fairly wide, making the caves accessible to most. The three caves of the system, one of which is specifically called Timpanogos Cave, are only viewable on guided tours when the monument is open, usually from May through September depending on snow conditions and funding. There is the standard tour going through the cave system, and an Introduction to Caving tour which teaches Leave No Trace caving and goes further into Hansen Cave. Three caves The three caves of the Monument that are tourable are: Hansen Cave, Middle Cave, and Timpanogos Cave. The three caves are connected by manmade tunnels blasted in the 1930s by the Wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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