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Adatara is a stratovolcano found about 15 km southeast of Fukushima city.
It is made up of three cones (Maegatake, Osoyozan and Adatara). These cones range from basaltic to andesitic in composition.
The summit of Adatara is a lava dome.
Adatara has had two historical eruptions.
Its last eruption was in 1990. Historical eruptions have been limited to Numano-daira crater.
Mt. Adams is an active andesitic stratovolcano. Most of the main cone is younger than 220,000 years. Post glacial eruptions and weak fumaroles suggest that Mt. Adams may erupt again. East Crater is a shield volcano along the Indian Heaven volcanic field that erupted basalt during the Pleistocene epoch.
Visit the Casacade Volcano Observatory for more information on the eruptive history and volcanic hazards of Mt. Adams.
Other Sources of Information:
- Hildreth, W., and Fierstein, J., 1985, Mount Adams: Eruptive history of an andesite-dacite stratovolcano at the
focus of a fundamentally basaltic field: U.S. Geological Survey Open-file Report 85-521, 44-50.
- Hildreth, W., and Fierstein, J., Geologic map of the Mount Adams volcanic field: U.S. Geological Survey.
- Wood, C.A., and Kienle, J., 1993, Volcanoes of North America: Cambridge University Press, New York, 354 p.
Main volcanoes of the Central American arc in Guatemala.
Acatenango's first historic eruption was in 1924. Two other eruptions occurred in 1924-1927 and 1972.
Geologists visited the summit in 1981 and report the strong smell of sulfur but no visible fumaroles.
Acatenango is one of the highest stratovolcanoes in central America.
Photograph by Steve O'Meara of Volcano Watch International.
Sources of Information:
McClelland, L., Simkin, T., Summers, M., Nielsen, E., and Stein, T.C., 1989, Global Volcanism 1975-1985: Englewood Cliffs, New Jersey, Prentice Hall, 655 p.
Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.