Fajã de Cima volcan | Falso Azufre | Fantale | Fayal | fissure vent | Flores | Fort Selkirk | fossile | Four Craters | Fremrinamur | Fuego | Fueguino | Fuerteventura | Fukue-jima | Fukujin | Fukutoku-Okanoba | Furnas | Fuss Peak
Fajã de Cima volcan (Volcano)
- Nearly 200 scoria cones dot the "waist" of Sao Miguel Island between Sete Cidades and Agua de Pau volcanoes. -> See whole entry
Falso Azufre (Volcano)
- Falso Azufre volcano is a volcanic complex on the Chile/ Argentina border. The 15 km long complex contains overlapping craters and lava domes. The western part contains the highest peak, Cerro Falso Azufre.
- Fantale (also spelled Fantalle or Fantala) is a large stratovolcano in the Ethiopian Rift Valley west of Lake Awash. It contains a large spectacular summit caldera. Fantale's historic eruptions produced lava flows that descended to the east side into the valley and lake Awash. An eruption during the 13th century destroyed a town and church located south of the volcano. In 1820, a 4 km long fissure eruption occured on the east flank and sent basaltic lava flows both into the caldera and outside, reaching the bottom of the Rift valley. -> See whole entry
- The island of Fayal, also spelled Faial, is the nearest of the central Azorean islands to the Mid-Atlantic Ridge. -> See whole entry
fissure vent (Volcanology)
- A fissure vent, also known as a volcanic fissure or simply fissure, is a linear volcanic vent through which lava erupts. -> See whole entry
- Flores Island and Corvo Island to its north are located far west of the rest of the Azores islands and are the only two Azorean volcanoes lying west of the Mid-Atlantic Ridge. -> See whole entry
Fort Selkirk (Volcano)
- Fort Selkirk is a volcanic field near the junction of the Yukon and Pelly rivers in central Yukon. It is the northernmost young volcanic field in Canada. The volcano consists of large valley-filling lava flows and 3 cinder cones. The volcanic field developed at the intersection of two prominent fault lines, one running east-west, marked by the Pelly River and the lower Yukon River, and the other one NW-SE, defined by the upper Yukon River. The first activity of the volcanic field were effusive, valley-filling eruptions of fluid basalt lava, followed by the construction of 3 cinder cones during strombolian-type eruptions and related emplacement of viscous aa lava flows. -> See whole entry
- Fossils are the mineralized or otherwise preserved remains or traces (such as footprints) of animals, plants, and other organisms. -> See whole entry
Four Craters (Volcano)
- The Four Craters lava field, along with Devils Garden and Squaw Ridge, is the SE-most of a group of 3 basaltic lava fields SE of Newberry volcano in the High Lava Plains of central Oregon. The Four Craters lava field contains 4 spatter cones along a 4-km-long NW-SE-trending line. The NW-most and highest cone has a well-preserved crater rim. The other 3 cones are breached to the west, SW, and south, respectively. The age of the Four Craters lava field is unknown, but probably similar to that of Squaw Ridge and Devils Garden, i.e. most likely about 10-20,000 years ago.
- Fuego, one of Central America's most active volcanoes, is one of three large stratovolcanoes overlooking Guatemala's former capital, Antigua. It typically has strombolian activity and sometimes phases of intense lava fountaining, producing tall ash plumes and dangerous pyroclastic flows. -> See whole entry
- Fueguino (Volcán Cook) volcano is the southernmost active volcano of South America's Andes, located on Isla Cook. It is 400 km away from the nearest other active volcano, Monte Burney to the NW. The volcano consists of lava domes and cinder cones. A strombolian eruption was observed in 1820. -> See whole entry
- Pleistocene and Holocene cinder cones and lava flows cover large portions of elongated Fuerteventura Island at the SE end of the Canary Islands. -> See whole entry
- Fukue-jima volcano is a group of basaltic shield volcanoes and cinder cones on Fukue island off the western coast of Kyushu, Japan. The volcanoes are 900,000 years old and last erupted about 2-3000 years ago. They are considered to be active. The On-dake cinder cone forms the highest point of the volcanic field, which forms peninsulas at the eastern and SE tips of Fukue Island as well as several smaller islands SE of Fukue.
- Fukujin volcano is one of the largest seamounts of the Marianas arc in Japan's Volcano Island chain. It sometimes has risen to above surface during eruptions creating temporary new islands. Water discoloration and floating pumice above the submarine volcano have been observed frequently.
- Fukutoku-Okanoba is a submarine volcano 5 km NE of the small pyramidal island Minami-iwo-jima in the Japanese Volcano Island chain. Eruptions and submarine hydrothermal activity often cause water discoloration in the area, and during eruptions, the volcano has built several temporary new islands. The first observation of a new island was in 1904-05 when it formed Shin-Iwo-jima ("New Sulfur Island"). Small new islands were also formed during the eruptions in 1914 and 1986. -> See whole entry
- Furnas volcano lies at the eastern end of Sao Miguel Island, immediately west of the older Nordeste shield volcano and its Povoaçao caldera. -> See whole entry
Fuss Peak (Volcano)
- Fuss Peak is an isolated andesitic stratovolcano on southern Paramushir Island, Kuril Islands. The volcano rises almost 3000 m from the sea floor and forms a peninsula of Paramushir connected to it by a low isthmus. The volcano contains a 700 m wide and 300 m deep crater, with a deep gully cutting its NW rim and forming a canyon down to the coast. Fresh-looking lava flows are on the E and SE flanks. The last confirmed historic activity was in 1854.