Phonolite is an uncommon shallow intrusive or extrusive rock, of intermediate chemical composition between felsic and mafic, with texture ranging from...

composition between phonolite and tephritePages displaying wikidata descriptions as a fallback – A volcanic rock with a composition between phonolite and tephrite...

Tephriphonolite or tephri-phonolite is a mafic to intermediate extrusive igneous rock in composition between phonotephrite and phonolite. It contains 9 to 14%...

in the Massif Central in France. It is made of a type of rock called phonolite. It rises to an altitude of 1,551 m (5,089 ft), and its base contains...

romanized: Ye’Åksum ḥāwelt) is a 4th-century CE, 24-metre (79 ft) tall phonolite stele, weighing 160 tonnes (160 long tons; 180 short tons), in the city...

active. The volcanoes are all surmounted by rocks composed of trachyte, phonolite, pantellerite, or comendite. Their activity has been attributed either...

capable of producing three notes in the first inversion of a triad. Various phonolite stones were created by volcanic activity on Oahu. These stones are known...

of diverse composition Nogal Peak Trachyte (31.4 Ma) Church Mountain Phonolite (32.7 Ma) Walker Group Three Rivers Formation, divided into members: Buck...

they are not unlike granites, but dark green varieties are also known. Phonolite is the fine-grained extrusive equivalent. Nepheline syenites are silica-undersaturated...

eruptive products of Erebus are anorthoclase-porphyritic tephritic phonolite and phonolite, which are the bulk of exposed lava flow on the volcano. The oldest...