Pantellerite
Sign in to savethumb|right|Thin section of [[ignimbrite of pantelleritic composition from Pantelleria, Italy]] Pantellerite is a type of volcanic rock, specifically a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite. It is named after Pantelleria, a volcanic island in the Strait of Sicily and the type location for this rock. On Pantelleria the rock is usually found as a vitrophyre containing phenocrysts of anorthoclase or sanidine. Quartz is found only in the most strongly peralkaline rocks. Mafic minerals may include aegirine, fayalite, aenigmatite, ilmenite, and sod
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thumb|right|Thin section of [[ignimbrite of pantelleritic composition from Pantelleria, Italy]] Pantellerite is a type of volcanic rock, specifically a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite. It is named after Pantelleria, a volcanic island in the Strait of Sicily and the type location for this rock. On Pantelleria the rock is usually found as a vitrophyre containing phenocrysts of anorthoclase or sanidine. Quartz is found only in the most strongly peralkaline rocks. Mafic minerals may include aegirine, fayalite, aenigmatite, ilmenite, and sodic amphibole (often arfvedsonite or ferrorichterite).
==Occurrence== North America Mount Edziza volcanic complex, northwestern British Columbia, Canada Ilgachuz Range, west-central British Columbia, Canada La Reforma, Baja California Peninsula, Mexico Level Mountain, northwestern British Columbia, Canada Antarctica Mount Berlin, Marie Byrd Land Mount Moulton, Marie Byrd Land Mount Noice, Victoria Land Asia Udokan Plateau, Russia Africa Dabbahu Volcano, Afar Region, Ethiopia Ma Alalta, Afar Region, Ethiopia Tat Ali, Afar Region, Ethiopia
Excerpted from Wikipedia’s “Pantellerite” article, available under the CC BY-SA 4.0 licence.