Tejeda | |
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Coordinates: 27°59′40″N15°36′50″W / 27.99444°N 15.61389°W Coordinates: 27°59′40″N15°36′50″W / 27.99444°N 15.61389°W | |
Country | Spain |
Autonomous Region | Canary Islands |
Province | Las Palmas |
Island | Gran Canaria |
Area | |
• Total | 103.30 km2 (39.88 sq mi) |
Elevation | 1,050 m (3,440 ft) |
Population (2018) [2] | |
• Total | 1,921 |
• Density | 19/km2 (48/sq mi) |
Time zone | UTC+0 (GMT) |
Tejeda is a village and a municipality in the mountainous central part of the island of Gran Canaria in the province of Las Palmas in the Canary Islands.
The village of Tejeda is situated 6 km (4 mi) north-west of the Pico de las Nieves and 23 km (14 mi) south-west of the island capital Las Palmas.
The municipality's area is 103.3 km2 (39.9 sq mi), [1] spreading near the centre of the island, on the latter's west side.
The south-eastern part of its territory includes the second highest point of Gran Canaria island, Pico de las Nieves ("Snows Peak") - 1,949 m (6,394 ft). Other remarkable summits in the municipality are Roque Nublo ("Cloud Rock") 813 m (2,667 ft) and Roque Bentayga ("Bentayga Rock") with its ritual place (almogarén) and other features. Close by are the cuevas del Rey ("the King's caves", 1 km to the west of Rock Bentayga), an antique cave house village with granaries; and 2 km further west the antique cave house village of Acusa Seca. [3] All these sites are listed Spanish Heritage as Properties of cultural interest ("Bien de Interés Cultural"). [4]
The village of Tejeda sits on the eastern edge [5] of a volcanic basin or crater that bears its name (caldera de Tejeda). [6] [note 1] [note 2]
The caldera’s dimensions are 28 km x 18 km, with a surface that extends from the head of Agaete's ravine (barranco de Agaete ) [7] near Artenara, to Verde Andén ("Green Platform") in the west, [8] Veneguera [9] and the head of Mogán ravine (barranco de Mogán) [10] up to Arguineguín's ravine (barranco de Arguineguin). [11] Only half of its perimeter remains standing; on what is left of it are found a few green-bluish peaks (such as "azulejos" de Veneguera - "Veneguera's tiles") and below these are the oldest basalts of the island, primitive substrate of Grand Canary. [12]
The caldera was produced in probably less than two hours, by the explosion of the residual magma chambers [note 3] During the collapse of the caldera de Tejera ignimbrite rock was produced, with a pink matrix dotted with white crystals. It exists because the explosive eruption by which the caldera collapsed was so powerful that the magma was pulverized in a very fine spray and created almost microscopic structures in the matrix rock. Ignimbrita is found on the outside of the periphery of the caldera.
The caldera also bears traces of a 2 million year period of evolution. This is especially notable at the heads of the Agaete ravine (barranco de Agaete) and Mogan ravine (barranco de Mogan), where we can see horizontal basaltic lavas in their lower parts and, above, thicker material in sloping layers. [12]
Another rare feature of the caldera is its system of conical dykes in its center, that were damaged by the eruptions and determined the structure of the island by their own structure. The lava passed through these dykes during some eruptions, in particular basaltic eruptions ; this created a crack in the surrounding channels where the lava was injected, and from them the volcano arose. In Grand Canary these conical dykes were centered on a focal point located roughly 2 km under sea level, at what was in the past the center of the island. New magma would then tend to also take the same conical shape. Conical dykes of this size are not found in other islands; Vallehermoso on La Gomera island has some smaller ones. [12]
Biologist Juan Sergio Socorro considers this crater to be one of the few clear examples in the world of a very large collapsed volcanic crater, particularly in comparison to the Cañadas del Teide for which several theories are held regarding its formation. [13] [note 4]
"El espectáculo es imponente. Todas aquellas negras murallas de la gran caldera, con sus crestas, que parecen almenas, con sus roques enhiestos, ofrecen el aspecto de una visión dantesca. No otra cosa pueden ser las calderas del Infierno que visitó el florentino. Es una tremenda conmoción de las entrañas de la tierra; parece todo una tempestad petrificada, pero una tempestad de fuego, de lava, más que de agua."
("The spectacle is impressive. All those black walls of the great caldera, with its crests, which look like battlements, with its erect rocks, offer a Dantesque vision. The cauldrons of Hell that the Florentine visited can be no different. It is a tremendous commotion of the entrails of the earth; it looks quite like a petrified storm, but a storm of fire, of lava, more than of water.")
Its population was 2,028 in 2013. [14]
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The Canary Islands, 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 100 kilometres 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.
A caldera is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is lost. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface. Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018.
Gran Canaria, also Grand Canary Island, is the third-largest and second-most-populous island of the Canary Islands, an archipelago off the Atlantic coast of Northwest Africa which is part of Spain. As of 2019 the island had a population of 851,231 that constitutes approximately 40% of the population of the archipelago. Las Palmas de Gran Canaria, the capital of the island, is the biggest city of the Canary Islands and the ninth of Spain.
La Palma, also known as La isla bonita and officially San Miguel de La Palma, is the most north-westerly island of the Canary Islands, Spain. La Palma has an area of 708 square kilometres (273 sq mi) making it the fifth largest of the eight main Canary Islands. The total population at the end of 2020 was 85,840, of which 15,716 lived in the capital, Santa Cruz de La Palma and about 20,467 in Los Llanos de Aridane. Its highest mountain is the Roque de los Muchachos, at 2,423 metres (7,949 ft), being second among the peaks of the Canaries only to the peaks of the Teide massif on Tenerife.
Mogán is a town and a Spanish municipality in the southwestern part of the island of Gran Canaria, which is one of the three main islands making up the Province of Las Palmas in the Canary Islands, Spain. Its population is 21,782 (2013), and the area is 172.44 km².
Teide, or Mount Teide, is a volcano on Tenerife in the Canary Islands, Spain. Its summit is the highest point in Spain and the highest point above sea level in the islands of the Atlantic.
The Cumbre Vieja is an active volcanic ridge on the island of La Palma in the Canary Islands, Spain. The spine of Cumbre Vieja trends in an approximate north–south direction, comprising the southern half of La Palma, with both summit ridge and flanks pockmarked by dozens of craters and cones. The latest eruption began on 19 September 2021 in a forested area of Las Manchas locality known as Cabeza de Vaca. Voluminous lava flows quickly reached populated areas downslope, fanning out across settlements and banana plantations, destroying thousands of buildings and ultimately pouring over steep cliffs into the ocean to enlarge the island at several locations. The volcano went quiet on 13 December 2021, and on 25 December 2021, the local government declared the eruption to be over.
Agaete is a municipality of Las Palmas province, on the Canary Islands, Spain.
Roque Nublo is a volcanic rock on the island of Gran Canaria, Canary Islands, Spain. It is 67 m (220 ft) tall, and its top is 1,813 m (5,948 ft) above sea level. The Roque Nublo is the third altitude of the island of Gran Canaria, after the Morro de la Agujereada with 1,956 meters, and the Pico de las Nieves with 1,949 meters.
The GC-2 is a superhighway in Gran Canaria. It connects Las Palmas de Gran Canaria with the village of Agaete.
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The Bandama Natural Monument is part of the Tafira Protected Landscape on the island of Gran Canaria in the Canary Islands, Spain. It's considered a point of geological interest, because of the Caldera de Bandama. This volcanic crater, which is geologically a maar rather than a caldera, reaches 569 m (1,867 ft) above sea level at the highest point on its rim, Pico de Bandama, and is about 1,000 m (3,300 ft) wide and 200 m (700 ft) deep. The crater was developed during the last heavy eruptions 2000 years ago. It is recorded as the last volcanic activity on Gran Canaria.
The Hospital Universitario Insular de Gran Canaria is a teaching hospital of general scope in Gran Canaria. Located in the city of Las Palmas de Gran Canaria, it was founded 13 February 1971 and consists in Februar 2021 of 503 beds. The first patient was hospitalized 20 September 1971.
Valerón's "monastery" is an archaeological site on the Spanish island of Grand Canary, in the municipality of Santa Maria de Guia, on Valerón's cliff. It is the largest pre-Hispanic collective granary built before Roman times and used by the island's inhabitants until the conquest of the island at the end of the 15th century.
The Guayadeque ravine, in Spanish Barranco de Guayadeque, is a ravine-type valley located on the Spanish municipalities of Ingenio and Agüimes, in the province of Las Palmas on Grand Canary island, off the coast of Morocco.
The Four Doors site, also known as Montaña Bermeja, 'Vermillion Mountain', is a complex of caves in the south of the municipality of Telde, Gran Canaria.
The El Maipés necropolis is an ancient burial site near Agaete on the Spanish island of Grand Canary, province of Las Palmas in the Canary Islands of the west coast of Africa.
Roque Bentayga is a rock formation on the island of Gran Canaria. It is located within the volcanic caldera of Tejeda, in the municipality of the same name, in the heart of the island. Roque Bentayga is considered an archaeological monument because it contains an "almogarén".