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Cueva De Don Justo
The Cueva de Don Justo (or Cave of Don Justo) is one of approximately 70 caves and volcanic galleries on the island of El Hierro in the Canaries. The Cueva de Don Justo is over in length, the cave is located in the El Lajial pahoehoe lava field near the Orchilla lighthouse in the south of El Hierro, it is a wild cave that extends around the Irama mountain (also called Prim mountain) for a total distance of (with the parallel passages making up the extra distance). It was first explored and mapped by a speleological expedition in 1961, with further expeditions in 1974, 1976, and 1978, before the 1979 expedition completed the mapping of the of cave system. It is the longest of 28 known lava tubes on El Hierro, and the 3rd longest lava tube in the Canary Islands, and the 13th longest in the world. The cave has a maximum depth of 135 to and at some points has up to 8 passages running in parallel. The cave contains well developed troglobitic fauna including seven species of tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Hierro
El Hierro, nicknamed ''Isla del Meridiano'' (the "Meridian Island"), is the second-smallest and farthest-south and -west of the Canary Islands (an autonomous community of Spain), in the Atlantic Ocean off the coast of Africa, with a population of 10,968 (2019). Its capital is Valverde. At , it is the second-smallest of the eight main islands of the Canaries. Name The name ''El Hierro'', although spelled like the Spanish word for 'iron', is not related to that word. The ''H'' in the name of the metal is derived from the ''F'' of Latin ''ferrum'' (compare ''higo'' for 'fig'), a phonetic mutation that was complete by the end of the Middle Ages. The confusion with the name of the metal had effects on the international naming of the island. As early as the 16th century, maps and texts called the island after the word for 'iron' in other languages: Portuguese ''Ferro'', French ''l'île de Fer'', and Latin '' Insula Ferri''. Nevertheless, the origin of the name ''ero'' or ''er ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Lajial Lava Field
EL, El or el may refer to: Religion * El (deity), a Semitic word for "God" People * EL (rapper) (born 1983), stage name of Elorm Adablah, a Ghanaian rapper and sound engineer * El DeBarge, music artist * El Franco Lee (1949–2016), American politician * Ephrat Livni (born 1972), American street artist Arts, entertainment, and media Fictional entities * El, a character from the manga series ''Shugo Chara!'' by Peach-Pit * El, short for Eleven, a fictional character in the TV series '' Stranger Things'' * El, family name of Kal-El (Superman) and his father Jor-El in '' Superman'' *E.L. Faldt, character in the road comedy film '' Road Trip'' Literature * ''Él'', 1926 autobiographical novel by Mercedes Pinto * ''Él'' (visual novel), a 2000 Japanese adult visual novel Music * Él Records, an independent record label from the UK founded by Mike Alway * ''Él'' (Lucero album), a 1982 album by Lucero * "Él", Spanish song by Rubén Blades from ''Caminando'' (album) * "Él" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pahoehoe
Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from . The volcanic rock resulting from subsequent cooling is also often called ''lava''. A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water. Even so, lava can flow great distances before cooling causes it to solidify, because lava exposed to air quickly develops a solid crust that insulates the remaining liquid lava, helping to keep it hot and inviscid enough to continue flowing. The word ''lava'' comes from Italian and is probably derived from the Latin word ''labes'', w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orchilla Lighthouse on El Hierro, in the Canary Islands
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Orchilla may refer to: * La Orchila, an island * "Orchella weeds," a lichen that is a source of a purple-blue dye extracted from orcein * Punta Orchilla Lighthouse The Punta Orchilla Lighthouse ( es, Faro de Punta Orchilla) is an active lighthouse on the Canary island of El Hierro in the municipality of El Pinar. The need for a lighthouse on the island was highlighted in the second maritime lighting plan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irama Mountain
''Irama'' is the term used for tempo in Indonesian gamelan in Java and Bali. It can be used with elaborating instruments. It is a concept used in Javanese gamelan music, describing melodic tempo and relationships in density between the balungan, elaborating instruments, and gong structure. It is distinct from tempo ( Javanese: ''Laya''), as each ''Irama'' can be played in different tempi. ''Irama'' thus combines "the rate of temporal flow and temporal density"; and the temporal density is the primary factor.Sumarsan, 1996. page 156 One way to think of ''Irama'' is to use the most consistently struck instrument in the gamelan, the ''saron panerus'' (or ''peking''). In some pieces, it plays once per note in the ''balungan'' (such as played by the ''saron barung''). In others, it may play twice as often, or four times, as the notes of the ''balungan'' are more spread out. This corresponds to a slower ''Irama''. In most cases, the more spread out the ''balungan'' is, the longer it t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speleological
Speleology is the scientific study of caves and other karst features, as well as their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term ''speleology'' is also sometimes applied to the recreational activity of exploration, exploring caves, but this is more properly known as ''caving'', ''potholing'' (British English), or ''spelunking''. Speleology and caving are often connected, as the physical skills required for ''in situ'' study are the same. Speleology is a cross-disciplinary field that combines the knowledge of chemistry, biology, geology, physics, meteorology, and cartography to develop portraits of caves as complex, evolving systems. History Before modern speleology developed, John Beaumont (geologist), John Beaumont wrote detailed descriptions of some Mendip Hills, Mendip caves in the 1680s. The term speleology was coined by Émile Rivière in 1890. Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Tube
A lava tube, or pyroduct, is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave. Formation A lava tube is a type of lava cave formed when a low-viscosity lava flow develops a continuous and hard crust, which thickens and forms a roof above the still-flowing lava stream. Tubes form in one of two ways: either by the crusting over of lava channels, or from pāhoehoe flows where the lava is moving under the surface. Lava usually leaves the point of eruption in channels. These channels tend to stay very hot as their surroundings cool. This means they slowly develop walls around them as the surrounding lava cools and/or as the channel melts its way deeper. These channels can get deep enough to crust over, forming an insulating tube that keeps the lava molten and serves as a conduit for the flowing lava. These types of lava tubes tend to be closer to the lava ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canary Islands
The Canary Islands (; es, Canarias, ), also known informally as the Canaries, are a Spanish autonomous community and archipelago in the Atlantic Ocean, in Macaronesia. At their closest point to the African mainland, they are west of Morocco. They are the southernmost of the autonomous communities of Spain. The islands have a population of 2.2 million people and they are the most populous special territory of the European Union. The seven main islands are (from largest to smallest in area) Tenerife, Fuerteventura, Gran Canaria, Lanzarote, La Palma, La Gomera, and El Hierro. The archipelago includes many smaller islands and islets, including La Graciosa, Alegranza, Isla de Lobos, Montaña Clara, Roque del Oeste, and Roque del Este. It also includes a number of rocks, including those of Salmor, Fasnia, Bonanza, Garachico, and Anaga. In ancient times, the island chain was often referred to as "the Fortunate Isles". The Canary Islands are the southernmost region of Spai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troglobitic
A troglobite (or, formally, troglobiont) is an animal species, or population of a species, strictly bound to underground habitats, such as caves. These are separate from species that mainly live in above-ground habitats but are also able to live underground (eutroglophiles), and species that are only cave visitors ( subtroglophiles and trogloxenes). Land-dwelling troglobites may be referred to as troglofauna, while aquatic species may be called stygofauna, although for these animals the term ''stygobite'' is preferable. Troglobites typically have evolutionary adaptations to cave life. Examples of such adaptations include slow metabolism, reduced energy consumption, better food usage efficiency, decrease or loss of eyesight (anophthalmia), and depigmentation (absence of pigment in the integument). Conversely, as opposed to lost or reduced functions, many species have evolved elongated antenna and locomotory appendages, in order to better move around and respond to environmental ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Tubes
A lava tube, or pyroduct, is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave. Formation A lava tube is a type of lava cave formed when a low-viscosity lava flow develops a continuous and hard crust, which thickens and forms a roof above the still-flowing lava stream. Tubes form in one of two ways: either by the crusting over of lava channels, or from pāhoehoe flows where the lava is moving under the surface. Lava usually leaves the point of eruption in channels. These channels tend to stay very hot as their surroundings cool. This means they slowly develop walls around them as the surrounding lava cools and/or as the channel melts its way deeper. These channels can get deep enough to crust over, forming an insulating tube that keeps the lava molten and serves as a conduit for the flowing lava. These types of lava tubes tend to be closer to the lava erup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of The Canary Islands
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, microorgani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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