Comondú-La Purísima volcano is a volcanic field of about 9000 sq km in southern Baja California, west of the Sierra de la Giganta.
Volcanic activity of La Purısima dates back about 10 million years ago, but might have continued into the Holocene (i.e. less than 10,000 years ago), as some of the cinder cones and blocky lava flows, in the area between Comondú and the La Purísima river, have preserved a very fresh morphology. -> Voir la description complète
Concepción volcano is a steep symmetrical stratovolcano with a perfect shape and one of the most active volcanoes of Nicaragua. During the past 100 years, it has been in a near-constant state of small to medium ash explosions at irregular intervals.
Together with its neighbor Madera volcano Concepción forms the NW half of the dumbbell-shaped island of Ometepe in Lake Nicaragua. Both volcanoes are connected by a narrow isthmus.
Frequent explosive eruptions during the past decades have increased the height of its summit significantly (more than 100 m) and outdated the existing topographic maps. Because of the frequent ash eruptions, the upper half of the summit cone lacks vegetation.
The basaltic-to-dacitic Concepción volcano contains a steep-walled 250 m summit crater with a higher western rim. Flank vents are aligned on N-S-trending fractures and contain chains of spatter cones, cinder cones, lava domes, and maars on the NW, NE, SE, and southern sides. Some of these vents are found down to Lake Nicaragua. -> Voir la description complète
Conchagua volcano (also known as Cochague) is an eroded stratovolcano on the western side of the Gulf of Fonseca in at the southeastern tip of El Salvador.
The main summit of Conchagua is Cerro del Ocote, but the secondary summit Cerro de La Bandera to the ENE of the elongated volcanic edifice seems to be younger.
It is uncertain whether the volcano should be considered still active, but it has certainly not erupted for a long time. There is fumarolic activity on some spots of both peaks. -> Voir la description complète
Conchagüita volcano at the SE tip of El Salvador forms a small 4-km-wide island in the Gulf of Fonseca separated from Conchagua volcano across a narrow strait.
The volcano is a sharp-topped cone with a 100-m-wide summit crater at the southern end and contains a young lava delta that forms a peninsula on the island's eastern side.
A crescent-shaped crater open to the west is located at the northern end of the island. The only known historic activity from Conchagüita volcano were small ash emissions in 1892.
Un cône volcanique ou cône de scorie (cinder cone) est une colline abrupte de taille plus ou moins importante située autour d’un évent constitué de fragments volcaniques qui s'accumulent autour et sous le vent d'un évent. Ces fragments de roche, souvent appelés cinders ou scorie, sont vitreux et contiennent généralement de nombreuses bulles de gaz "gelées" et piégées dans le magma au moment ou il éclate dans l'air et subissant un refroidissement rapide. Les cônes volcaniques (cône de scorie) ont des tailles d’une dizaine à plusieurs centaines de mètres de haut et sont généralement formé par des fontaines de lave ou d’éruptions stromboliennes. -> Voir la description complète
Cook volcano is an alleged active submarine volcano in the Western Solomons, whose existence is questionable and not accepted by Smithsonian's Global Volcanism database, although it is listed as one of the 4 active volcanoes (Savo, Kavachi, Cook and Tinakula) of the Solomon Islands in the 1957 "Catalogue
of the Active Volcanoes of the World" by Fischer. These
are Savo, Kavachi, Cook and Tinakula. . Possible eruptions of the Cook volcano occurred in 1964 and 1991, and were reported by Australian navy. -> Voir la description complète
Copahue volcano is an active stratovolcano in central Chile at the border with Argentina. The volcano has a 6.5 x 8.5 km wide caldera with several craters aligned on a 2 km ENE-WSW trending zone.
The eastern summit crater has an acid 300 m wide crater lake known as El Agrio or Del Agrio which has intense hydrothermal activity.
Infrequent mild-to-moderate explosive eruptions occurred in historic time. Eruptions in the last century have ejected pyroclastic rocks and chilled liquid sulfur fragments. The last one was in 2000. -> Voir la description complète
Copiapo volcan est une stratovolcan andésitique à dacitique dans la province d'Atacama au nord du Chili, près de Nevado Tres Cruces parc national et la Laguna del Negro Francisco. La plupart de l'édifice du volcan est de plusieurs centaines de milliers à des millions ans, et pourrait être éteints Copiapo bien qu'il y ait encore une activité solfatarique. Le volcan contient 8 cônes de scories andésitiques principalement situés sur le flanc SE. Le cône le plus récent est Volcn San Romn 7 km au nord de Copiap.
Corcovado volcano is an isolated and little studied stratovolcano in southern Chile. Its only known historic activity was in 1834 and/or 1835. C. Darwin described seing it in activity in 1834 and an explosive eruption was reported to have occurred in November 1835 by a resident from Chiloe, 60 km west of the volcano.
Corcovado is ice-covered and basaltic to basaltic-andesite in composition. It has several young (Holocene) cinder cones on its flanks, which are likely the source of its recent eruptions.
Cordón de Puntas Negras is a stratovolcano in northern Chile 46 km SE of Lascar volcano.
The volcano has a number of fresh-looking cones and craters such as Cerros Cenizas, Aguas Calientes, Laguna Escondida, and Chinchilla with well-preserved summit craters and short lava flows. In addition, there is a distinct maar and a large, 13 sq km silicic lava flow and dome complex.
It is thought that some of these vents are less than 10,000 years old, or even historical in age. The youngest of the complex is a crater SE of Cerro Laguna Escondidax. -> Voir la description complète
Cordón del Azufre is a small volcanic complex on the Argentina/Chile border. The volcano consists of a cluster of lava flows from a row of vents on the NW (Argentinian) side, and a 5 km long chain of vents along the border with Chile.
Note: there is a volcano with a similar name Cerro del Azufre in Northern Chile. -> Voir la description complète
Coronado volcano is a small stratovolcano in the Gulf of California. It forms a 2 km wide peninsula at the northern tip of Coronado Island, 3 km off the eastern coast of Baja California in the Canal de los Ballenas.
The roughly 440-m-high volcano contains a 300 x 160 m wide crater. Little is known about Volcán Coronado and it is unknown when it last erupted. Fumarolic activity was reported in September 1539.
Nevado Coropuna volcano in southern Peru is the largest and highest active volcano in Peru. It rises majestically 4500 m from the surrounding terrain and forms an 10x20 km E-W elongated complex.
The massive ice-covered complex has at least 6 summit cones. The flanks of the volcano are characterized by deep canyons.
There have been no recorded eruptions and the age of the last eruption is unknown, but there is solfataric activity suggesting that the volcano might still be active.
Cosigüina (or Cosegüina) volcano in western Nicaragua forms a large peninsula into the Gulf of Fonseca. The last eruption of the volcano was in 1959, but periods of unrest have occurred in recent years and in 1835, it produced the largest known historic eruption in Nicaragua.
The basaltic to andesitic volcano has a concentric structure consisting of the remnants of an large older cone, which collapsed more than 10,000 years ago and left a crescent-shaped somma rim on the outside. In the old caldera, a young cone has been built and is itself truncated by an elliptical 2.4 x 2 km wide and 500 m deep caldera. The young caldera crater contains a beautiful lake.
Most deposits inside the caldera are from lava flows, while ash and pumice layers predominate the outer flanks.
Le champ volcanique de Coso est situé à l'est de la Sierra Nevada, à la lisière ouest de la province Basin and Range, en Californie. Il se compose de 38 ans dômes de lave rhyolitiques et des cônes de scories basaltiques qui couvre une superficie de 400 km ². volcan est situé à 200 km au nord de Los Angeles, en Californie. Éruptions dans ce domaine au cours des 4 derniers millions d'années a produit 35 km3 de lave, le plus jeune éruptions sont probablement de la crête du volcan cône de scories basaltiques et sont survenus plus de 33.000 ans. Coso système géothermique Il ya une activité géothermique dans une zone en direction ENE entre le mont Sugarloaf et les ressorts Coso chaud. Les sources chaudes ont Coso fumerolles et des geysers actifs par intermittence. Fumerolles au Kitchen Devils et la zone adjacente Nicol sont situées dans un cratère d'explosion entourant un dôme de lave rhyolitique. -> Voir la description complète
Cotopaxi is one of South America's most famous volcanoes and one of its most active ones. With its 5911 m it also ranks among the world's highest active volcanoes (26th highest).
The majestic, snow covered symmetrical stratovolcano is located on the Eastern Cordillera of the Ecuadorian Andes, 60 km south of Quito and 35 km northeast of Latacunga.
Cotopaxi's steep cone has nested summit craters, the outer of which measures 550 x 800 m in diameter.
Cotopaxi erupted more than 50 times since 1738. The most violent historical eruptions of Cotopaxi volcano were in 1744, 1768, 1877, and 1904. its eruptions often produced pyroclastic flows and destructive mud flows (lahars). Some lahars have travelled more than 100 km and reached the Pacific to the west and the Amazon Basin to the east.
At the moment, it has been dormant for over 70 years, which is an unusual long interval in its recent history. -> Voir la description complète
Magma émis lors d'une éruption, suffisament fluide pour s'épancher et couler sur la surface pour former une coulée de lave. -> Voir la description complète
Crater Basalt is a volcanic field of 9 cinder cones in the northern Patagonia region of southern Argentina 130 km SE of San Carlos de Bariloche.
The volcanic field covers an area of 700 sq km, and consists of cinder and spatter cones with many overlapping blocky basalt lava flows. -> Voir la description complète
Crater Lake in the southern Cascade Range of Oregon, USA, is one of the most beautiful calderas in the world. It formed by the collapse of a massive stratovolcano known as Mount Mazama about 6850 years ago. The caldera measures 8x10 km in diameter and is filled with a lake of up to 600 m depth.
A small island, Wizzard Island, is a cinder cone that grew after the formation of the caldera. The caldera is part of Crater Lake National Park. -> Voir la description complète
Crater Mountain volcano is a curved volcanic chain of 3000 m and higher peaks located in the highlands of New Guinea. The volcanoes are deeply eroded, but there are young flows covering the steep-sided valleys to the north and east, which might be of Holocene age. The easternmost Agotu Valley contains several small craters, cinder cones, and maars.
Crater Mountain is part of the 2700 km2 Crater Mountain Wildlife Management Area, known for its spectacular scenery and traditional villages.
The Craters of the Moon are located at the NW end of the largest lava field of the Snake River Plain in Idaho, USA. The volcanic field contains over 60 lava flows, 25 cinder cones up to 250-m high, and 8 eruptive fissure systems, and covers an area of 1600 km2.
The Craters of the Moon formed in 8 eruptive periods each lasting several hundred years, and separated by quiescence intervals of up to 3000 years. The eruptions began about 15,000 years ago, and ended with the most recent (so far) eruptions only 2100 years ago. In contrast to the Craters of the Moon, most other lava fields in the Snake River Plain formed during single, short eruptions.
On average, lava output rate was 1.5 cubic km/1000 years for the period 15,000 to 7,000 years ago and increased to 2.8 cubic km /1000 years for the interval from 7,000 to 2,000 years ago. -> Voir la description complète
En chimie, minéralogie et en science des matériaux, un cristal est un solide dans lequel les atomes, les molécules ou les ions constitutifs, sont agencés dans une structure régulièrement ordonnée. La maille cristalline de base, dont l’équivalence du point de vue de sa composition chimique «le motif de base » est répété dans les trois dimensions spatiales pour y dessiner le réseau cristallin. -> Voir la description complète
Crow Lagoon is a little-known volcanic center located north of Prince Rupert, British Columbia, Canada. There are thick layers of basaltic scoria from eruptions less than 10,000 years old.
Crow Lagoon is one of the top 10 volcanoes in Canada with recent seismic activity. The others include: Castle Rock, Mount Edziza volcanic complex, Mount Cayley, Hoodoo Mountain, The Volcano, Mount Silverthrone, Mount Meager, Wells Gray-Clearwater volcanic field and Mount Garibaldi.
Cu-Lao Re volcano is a group of 4 basaltic sub-aerial and 9 submarine volcanic cones 150 km off the coast of central Vietnam.
3 of the subaerial cones form Cù-Lao Ré Island, and the fourth forms Cù-Lao Bo Bai Island.
Cuernos de Negros (also known as Magaso) is a large stratovolcano complex located in SE Negros Island, Philippines, near the city of Dumaguete. It is unknown when it has erupted after since the last radiocarbon-dated activity about 14,000 years ago. At present, it still has active fumaroles at the highest crater of Magaso, sulphuric springs at the ESE flanks and hot springs on the NE flank.
An increase in fumarolic activity was observed after (and probably triggered by) a major tectonic earthquake in 1902.
The Palinpinon geothermal field is located south of the Okoy River on the north side of the volcano. -> Voir la description complète
Cuernos del Diablo volcano is a partially glacially eroded basaltic stratovolcano in southern Chile. The volcano has been frequently active in the Holocene (within the past 11,700 years) and produced flank cones and erupted basaltic lava flows. Most eruptions took place from vents on the SW flank and from the summit to the NW base of the volcano.
There are no historically recorded eruptions, but it is possible that the volcano has been active in the past centuries.
Fumaroles were observed on a flank cone in 1931.
Cuicocha volcano is a beautiful caldera in northern Ecuador 100 km north of Quito. The volcano has a 3 km wide lake filled caldera and sits at the feet of the sharp-peaked (extinct) Cotacachi stratovolcano.
There are gas emissions from several locations in the caldera lake at present indicating the volcano is still active. -> Voir la description complète
Cumbal volcano is an active glacier-capped stratovolcano in SW Colombia, located 25 km SW of Azufral volcano and 5.5 km NE of the town of Cumbal - Pueblo.
Cumbal is the southernmost active volcano of Colombia that has erupted in historic times.
A young lava dome occupies the 250-m-wide summit crater, and eruptions from the upper east flank produced a 6-km-long lava field. Thermal springs occur on the SE flanks. -> Voir la description complète
Dacht-i-Navar volcano is a group of 15 lava domes in west-central Afghanistan SW of Kabul.
Their age is unknown, but it is speculated that they have erupted less than 10,000 years ago and should be considered potentially active.
The lava domes are trachyandesitic in composition and located along the southern margin of Dacht-i-Navar.
Une Dacite est une roche ignée, volcanique avec un fort taux de fer dans sa composition chimique et trouvée dans beaucoup de dômes de lave. -> Voir la description complète
Daikoku is a sumbarine volcano with a conical summit in the Japanese Volcano Islands chain. It sits on an elongated E-W-trending ridge SE of Eifuku submarine volcano and rises to within 323 m of the sea surface. It has a crater with a black pool of liquid sulfur discovered in 2006.
Daikoku submarine volcano is one of about a dozen submarine volcanoes displaying hydrothermal activity in the southern part of the Izu-Marianas chain. -> Voir la description complète
Daisetsu (also spelled Taisetsu) volcano is a group of 8 stratovolcanoes, lava domes and a small 2 km wide caldera in the Daisetsu-zan National Park (the roof of Hokkaido) in central Hokkaido.
Asahi (旭岳 Asahi-dake) volcano is the highest peak of the volcanic complex and the highest mountain in Hokkaido.
No historical eruptions are known from Daisetsu, although the last eruption must have taken place in or after 1739 AD. At present, there are fumaroles and sulfur was mined at Asahi-dake.
Daisetsu-zan National Park is the largest national park of Japan covering 230,000 ha. The park stretches from Mt. Torashiumu to the Tokachi Mountains. It is known for its hot springs, which can be found at Sounkyou, Yukomanbetsu, Tenninkyou, Nukabira, Shirogane, Shikaribetsu and Tomuraushi. -> Voir la description complète
Dakataua volcano is a large caldera on the northern end of Willaumez Peninsula, New Britain. The elliptical caldera, 13.5 km E-W and 10.5 km N-S, is one of New Britain's most impressive volcanoes. The caldera contains the 12 km wide horseshoe-shaped Lake Dakataua which is at only 50 m above sea level.
The Dakataua caldera formed during probably several Plinian eruptions. The last one occurred about 1150 years ago, and was followed by at least 5 subplinian to vulcanian explosions.
The highest point of the volcanic complex is Mt Makalia (350m), a small andesitic stratovolcano (or large cinder cone) that formed after the caldera. Together with other post-caldera cones and explosion craters aligned on a N-S line, they form a large peninsula of the lake. The last activity from the volcano was from Makalia in the lat 19th century.
At present, there is fumarolic activity occurs at the summit of Makalia and warm springs are found in the lake at the base of the mountain. -> Voir la description complète
Stratovolcano in the Erta Ale range (Ethiopia) which started a major effusive eruption on Nov 4, 2008 - one of the largest effusive eruptions in Africa during historic times. -> Voir la description complète
The Dallol volcano, or rather the Dallol hydrothermal field is located in a remote part of the northern Danakil Depression in NE Ethiopia. It is the lowest known sub-aerial volcanic area in the world.
Dallol is one of the world's most spectacular landscape: a vast area of uplifted thick salt deposits affected by intense fumarolic activity, probably caused by an active volcanic system beneath several kilometers of evaporation salt deposits.
Dallol is said to be the hottest place on the planet, with average annual temperatures well above 30 deg C.
The area commonly referred to Dallol volcano contains the approx. 1.5 x 3 km wide Dallol "mountain" (rising about 50 m above the great salt lake) near the border with Eritrea, and nearby warm springs including the Yellow Lake, the Black Mountain with the Blue Lake, said to be an explosion crater from a hydrothermal eruption in 1926.
Dallol is famous for its hot brine, and multicolored white, pink, red, yellow, green, gray and black salt deposits, hot springs and miniature geysers. These bizarre structures form in a complex interaction of solution and recrystallization processes driven by hydrothermal waters and rapid evaporation. -> Voir la description complète
Damavand volcano is a majestic stratovolcano located 70 km NE of Tehran and 70 km south of the Caspian Sea. Mt Damavand is the highest peak in the Middle East and the second highest volcano in Asia (after Kunlun volcano in Tibet).
Damavand last erupted about 7,300 years ago. There are no historical eruptions, but fumaroles at the summit crater suggest that the volcano is still active. -> Voir la description complète
The Danau volcano is a caldera at the western end of Java Island. It formed less than 10,000 years ago and is flaked by the remains of two older startovolcanoes (Pulosari and Karang). Inside the caldera, about 10 geothermal areas with hot springs are active, along a NE-SW trend. -> Voir la description complète
A group of six cinder and lava cones of Pleistocene-to-Holocene age is located in southern Armenia on the western slopes of the Vardeniss volcanic ridge, south of Lake Sevan. -> Voir la description complète
The Datong volcanoes are located 3 km northeast of Datong City at Xigelaoshan in North China west of Beijing.
The volcanic field contains 30 cinder cones over an area of about 60 sq km. The most notable cones are Heishan (1,422 meters above sea level), Jinshan (1,368 meters above sea level), Langwoshan (1,028 meters above sea level) and Gelaoshan (1,276 meters above sea level). The well-preserved Jinshan cone is a major tourist attraction of the area.
There are unconfirmed records of historic eruptions around 450 AD. -> Voir la description complète
Deception Island is a 14 km wide, ring-shaped volcanic island at the south-western end of the South Shetland Islands, NE of Graham Land Peninsul.
It is one of the most well-known active volcanoes of the Antarctic region.
Deception Island is a sea-filled caldera with a diameter of 7 km with a narrow entry (Neptunes Bellows) on the SE side. The island forms a natural harbour and was a popular base for whaling ships in the 19th century. There were huts and shelters and, later, scientific observatory stations, which were damaged during the last eruptions in 1967 and 1969. -> Voir la description complète
Ce sont des écoulements dilués et turbulents de morceaux de débris de roches dans un flux contenant des gaz chauds. Ce type d’ écoulement pyroclastique concerne des flux de milieux peu dense au sein desquels le transport par turbulence est le plus élevé.
-> Voir la description complète
Demon is a stratovolcano on the extreme northern tip of Iturup Island, Kuriles. The volcano has had no recent eruptions, but might still be active. It was built during the past 10,000 years inside a glacial valley 3 km east of the older eroded Kamui volcano. Damon's summit has a 1.5-km-wide crater open to the east.
Un dépôt de retombées de cendres volcaniques est un dépôt de cendres formé par l'accumulation de retombées de cendres issues de l'air en provenance d'un panache volcanique -> Voir la description complète
Descabezado Grande ("the big decapitated") volcano in central Chile is an active stratovolocano with a 1.4 km wide ice-filled summit crater, a basal diameter of 11 km and a volume of 30 cubic km.
The only historical eruption was in 1932, when a lateral crater formed on the upper NNE, shortly after the end of the major 1932 eruption from nearby Quizapu volcano on the north flank of Cerro Azul. At the moment the volcano is dormant, but the NE corner of the caldera has active fumaroles. -> Voir la description complète
Devils Garden volcanic field in central Oregon, east of the Cascade Range, is the NW-most of a group of 3 young basaltic lava fields SE of Newberry volcano. It covers 117 sq km and consists of fissure vents and lava flows. -> Voir la description complète
Davis Lake area in Oregon, USA, is a volcanic field with 3 cinder cones and lava flows of three cinder cones and associated lava flows. -> Voir la description complète
