pantellerite

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• pantellerite — panˈtellerite Min. [Named by Förstner from Pantelleria, an island between Sicily and Tunis.] A mineral found at Pantelleria, intermediate in composition between dacite and liparite, and more or less trachytic in character. in Cent. Dict …   Useful english dictionary

• Pumice — is a textural term for a volcanic rock that is a solidified frothy lava composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. It is commonly, but not exclusively of silicic or… …   Wikipedia

• Northern Cordilleran Volcanic Province — NCVP …   Wikipedia

• Aenigmatit — Chemische Formel Na2(Fe2+4Ti)Fe2+[O2|Si6O18] [1] Mineralklasse Silikate und Germanate Ketten und Bandsilikate 9.DH.40 (8. Auflage: VIII/F.14 20) (nach Strunz) 69.02.01a.01 (nach Dana) Kristallsystem …   Deutsch Wikipedia

• rhyolite — rhyolitic /ruy euh lit ik/, adj. /ruy euh luyt /, n. a fine grained igneous rock rich in silica: the volcanic equivalent of granite. [1865 70; rhyo (irreg. < Gk rhýax stream of lava) + LITE] * * * Igneous rock that is the volcanic equivalent of… …   Universalium

• VOLCANISME ET VOLCANOLOGIE — Le 24 août de l’an 79 après J. C., le Vésuve se réveilla au terme d’un repos de plusieurs siècles et détruisit les villes d’Herculanum, de Pompéi et de Stabiès. En 1783, l’éruption fissurale du Laki, en Islande, entraîna la mort de plus de 10 000 …   Encyclopédie Universelle