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

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

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

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...

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...

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

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

stratigraphic and petrographic description: phonolite was firstly erupted, followed by a tephritic phonolite and finally a phonolitic tephrite). According...

The phonolite or clinkstone of northern Ethiopia is a shallow-seated igneous rock. The phonolites intruded and punctured the Mesozoic sedimentary rocks...

mountain range. The volcanoes consist mainly of basalt, trachyte and phonolite in the form of lava flows, scoria and hydrovolcanic formations. Volcanic...

The volcanic rocks range from ankaramitic basanite through tephrite to phonolite and some have ultra-potassic compositions, which is unusual for rocks...

as the occurrence of rhönite, a very rare mineral, with the minerals phonolite and trachyte in the Dunedin Volcano, confused matters until international...

Bořeň (German: Borschen; 539 m) is a phonolite hill two kilometres south of Bílina in northwest Bohemia, Czech Republic. When seen from the northwest...

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...

phono-tephrite is a strongly alkaline volcanic rock with a composition between phonolite and tephrite. This unusual igneous rock contains 7 to 12% alkali content...

Porphyritic tephriphonolite to phonolite lavas of the Caldera Rim group, dated to 274,000–170,000 years ago Phonolite lava flows with aegirine phenocrysts...

including 500 handaxes and cleavers at the HK (Hopwood's Korongo) site, while phonolite handaxes and an elephant bone handaxe were found at the HEB (Heberer's...

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

nepheline tephrite from Hamberg bei Neckarelz near Heidelberg, Germany, phonolite-tephrite at Monte Vulture, Basilicata, Italy and basanite–tephrite intrusions...