andesite magma

GLOSSARY OF VOLCANIC TERMS
A magma with a chemical composition ranging from 53% to 63% which, upon crystallization, forms an andesite.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • andesite — GLOSSARY OF VOLCANIC TERMS A grey to grey green colored volcanic rock containing 53% to 63% silica (compositionally between basalt and dacite). Minerals commonly found in andesite include intermediate composition plagioclase and hornblende. USGS… …   Glossary of volcanic terms

  • Andesite — For the extinct cephalopod genus, see Andesites. Andesite (pronEng|ˈændəsaɪt) is an igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. The mineral assemblage is typically dominated by plagioclase plus… …   Wikipedia

  • Magma — For other uses, see Magma (disambiguation). Lava flow on Hawaii. Lava is the extrusive equivalent of magma. Magma (from Greek μάγμα paste ) is a mixture of molten rock, volatiles and solids[1] …   Wikipedia

  • Subalkalisches Magma — Der Begriff subalkalisch wird in der Petrologie verwendet, um Magmen und deren Gesteine (Plutonite wie Vulkanite) in alkalische Magmen und subalkalische Magmen (bzw. Gesteine) aufspalten zu können. Subalkalische Magmen haben dabei im Gegensatz zu …   Deutsch Wikipedia

  • scoria cone — GLOSSARY OF VOLCANIC TERMS Small volcanic landforms formed from focused (single vent) subaerial strombolian eruptions of basalt or basaltic andesite magma. These features have an inverted cone shaped profile and are generally circular in plan,… …   Glossary of volcanic terms

  • Mount Cayley volcanic field — Coordinates: 50°07′13″N 123°17′26″W / 50.12028°N 123.29056°W / 50.12028; 123.29056 …   Wikipedia

  • volcano — /vol kay noh/, n., pl. volcanoes, volcanos. 1. a vent in the earth s crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. 2. a mountain or hill, usually having a cuplike crater at the summit,… …   Universalium

  • igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

  • Igneous rock — Geologic provinces of the world (USGS)   Shield …   Wikipedia

  • Mount Cayley — The Mount Cayley volcanic complex in August 13, 2005. Summits left to right are Pyroclastic Peak and Mount Cayley. Elevation 2,377 m (7,799 ft) …   Wikipedia

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