Silverthrone Caldera (original) (raw)

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La caldeira de Silverthrone, en anglais : Silverthrone Caldera, est une caldeira située dans les chaînons du Pacifique, en Colombie-Britannique, au Canada. Cette caldeira est l'une des plus importantes de l'Ouest canadien, mesurant environ 30 kilomètres de long (axe nord-sud) pour 20 kilomètres de large (axe est-ouest). Le mont Silverthrone, un dôme de lave érodé, se situe sur le flanc nord de la caldeira et culmine à 2 864 mètres. Plusieurs glaciers (Pashleth, Kingcome, Trudel, Klinaklini et Silverthrone) se situent sur la caldeira. Elle est elle-même située sur le champ de glace Ha-Iltzuk.

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dbo:abstract The Silverthrone Caldera is a potentially active caldera complex in southwestern British Columbia, Canada, located over 350 kilometres (220 mi) northwest of the city of Vancouver and about 50 kilometres (31 mi) west of Mount Waddington in the Pacific Ranges of the Coast Mountains. The caldera is one of the largest of the few calderas in western Canada, measuring about 30 kilometres (19 mi) long (north-south) and 20 kilometres (12 mi) wide (east-west). Mount Silverthrone, an eroded lava dome on the caldera's northern flank that is 2,864 metres (9,396 ft) high, may be the highest volcano in Canada. The main glaciers in the Silverthrone area are the Pashleth, Kingcome, Trudel, Klinaklini and Silverthrone glaciers. Most of the caldera lies in the Ha-Iltzuk Icefield, which is the largest icefield in the southern half of the Coast Mountains; it is one of the five icefields in southwestern British Columbia that thinned between the mid-1980s and 1999 due to global warming. Nearly half of the icefield is drained by the Klinaklini Glacier, which feeds the Klinaklini River. The Silverthrone Caldera is very remote and rarely visited or studied by geoscientists, such as volcanologists. It can be reached by helicopter or — with major difficulty — by hiking along one of the several river valleys extending from the British Columbia Coast or from the Interior Plateau. (en) La caldeira de Silverthrone, en anglais : Silverthrone Caldera, est une caldeira située dans les chaînons du Pacifique, en Colombie-Britannique, au Canada. Cette caldeira est l'une des plus importantes de l'Ouest canadien, mesurant environ 30 kilomètres de long (axe nord-sud) pour 20 kilomètres de large (axe est-ouest). Le mont Silverthrone, un dôme de lave érodé, se situe sur le flanc nord de la caldeira et culmine à 2 864 mètres. Plusieurs glaciers (Pashleth, Kingcome, Trudel, Klinaklini et Silverthrone) se situent sur la caldeira. Elle est elle-même située sur le champ de glace Ha-Iltzuk. (fr) La caldera di Silverthrone (in inglese Silverthrone Caldera) è un complesso vulcanico potenzialmente attivo situato nel sud-ovest della Columbia Britannica, in Canada, distante 350 km a nord-ovest della città di Vancouver e circa 50 km a ovest del monte Waddington nelle Montagne del Pacifico (Pacific Ranges), comprese a loro volta nelle Montagne Costiere. La caldera è una delle maggiori tra le poche presenti in Canada occidentale, misurando circa 30 km di lunghezza (asse nord-sud) e 20 di larghezza (est-ovest). Il monte Silverthrone, un duomo di lava eroso sul fianco settentrionale della caldera e alto 2.864 m, risulta tra i vulcani più elevati del Canada. I principali ghiacciai nell'area della caldera sono il Pashleth, il Kingcome, il Trudel, il Klinaklini e il Silverthrone. La maggior parte del sito giace nel campo di ghiaccio di Ha-Iltzuk, il più vasto localizzato nella metà meridionale delle Montagne Costiere; si tratta di uno dei cinque campi di ghiaccio nella Columbia Britannica sudoccidentale assottigliatisi dalla metà degli anni '80 a causa del surriscaldamento globale. Quasi la metà del ghiacciaio Klinaklini alimenta il corso d'acqua omonimo, mentre altro generano falde e corsi d’acqua minori. La caldera del Silverthrone si colloca in una località remota e viene raramente visitata o studiata da geoscienziati, inclusi i vulcanologi. Può essere raggiunta in elicottero o, con difficoltà maggiori, compiendo un'escursione lungo una delle numerose valli fluviali che si estendono dalla costa della Columbia Britannica o dall'Interior Plateau. (it)
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dbp:elevationM 3160 (xsd:integer)
dbp:lastEruption Unknown; possibly younger than 1000 (en)
dbp:listing List of volcanoes in CanadaList of Cascade volcanoes (en)
dbp:location British Columbia, Canada (en)
dbp:name Silverthrone Caldera (en)
dbp:photo Silverthrone Caldera outline.jpg (en)
dbp:photoCaption The approximate outline of the Silverthrone Caldera (en)
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dbp:type dbr:Caldera dbr:Volcanic_complex
dbp:volcanicArc/belt Canadian Cascade ArcPemberton/Garibaldi Belt (en)
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rdfs:comment La caldeira de Silverthrone, en anglais : Silverthrone Caldera, est une caldeira située dans les chaînons du Pacifique, en Colombie-Britannique, au Canada. Cette caldeira est l'une des plus importantes de l'Ouest canadien, mesurant environ 30 kilomètres de long (axe nord-sud) pour 20 kilomètres de large (axe est-ouest). Le mont Silverthrone, un dôme de lave érodé, se situe sur le flanc nord de la caldeira et culmine à 2 864 mètres. Plusieurs glaciers (Pashleth, Kingcome, Trudel, Klinaklini et Silverthrone) se situent sur la caldeira. Elle est elle-même située sur le champ de glace Ha-Iltzuk. (fr) The Silverthrone Caldera is a potentially active caldera complex in southwestern British Columbia, Canada, located over 350 kilometres (220 mi) northwest of the city of Vancouver and about 50 kilometres (31 mi) west of Mount Waddington in the Pacific Ranges of the Coast Mountains. The caldera is one of the largest of the few calderas in western Canada, measuring about 30 kilometres (19 mi) long (north-south) and 20 kilometres (12 mi) wide (east-west). Mount Silverthrone, an eroded lava dome on the caldera's northern flank that is 2,864 metres (9,396 ft) high, may be the highest volcano in Canada. (en) La caldera di Silverthrone (in inglese Silverthrone Caldera) è un complesso vulcanico potenzialmente attivo situato nel sud-ovest della Columbia Britannica, in Canada, distante 350 km a nord-ovest della città di Vancouver e circa 50 km a ovest del monte Waddington nelle Montagne del Pacifico (Pacific Ranges), comprese a loro volta nelle Montagne Costiere. La caldera è una delle maggiori tra le poche presenti in Canada occidentale, misurando circa 30 km di lunghezza (asse nord-sud) e 20 di larghezza (est-ovest). Il monte Silverthrone, un duomo di lava eroso sul fianco settentrionale della caldera e alto 2.864 m, risulta tra i vulcani più elevati del Canada. (it)
rdfs:label Caldeira de Silverthrone (fr) Caldera di Silverthrone (it) Silverthrone Caldera (en)
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