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...

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...

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...

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...

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

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

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

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...

at 600 km3 (140 cu mi). The final phase of eruptions are preserved as phonolite domes around Mount Cargill. Traces of the old Dunedin Volcano are best...

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

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...

nepheline mugearite and benmoreite or nepheline benmoreite to trachyte or phonolite. The potassic series evolves through trachybasalt or leucite trachybasalt...

dolerite Tejeda Gran Canaria Miocene trachyte, phonolite Vallehermoso La Gomera Miocene trachyte, phonolite Jabal Arknu Libya Tertiary Otoge Japan Miocene...

deep water along the Cameroon Line. The volcanic soils of basalts and phonolites, dating to 3 million years, have been used for plantation crops since...

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

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...

elements and the Dunedin Volcano which also has trachytic, olivine and phonolite elements erupted. The other main area of now land volcanism was what was...

new magma intrusion occurred in the Early Miocene, which gave rise to phonolite plugs, mainly in the Adwa area and also in Dogu’a Tembien. The present...

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

constituents of igneous rocks rich in sodium, such as nepheline-syenite and phonolite. Pargasite is a rare magnesium-rich variety of hornblende with essential...

and fluid lavas, but they differentiated over time (trachybasalts and phonolites), which gave place to more explosive eruptions. The rifts mainly emitted...

intermediate in composition (e.g., rhyolitic, dacitic, andesite, pantellerite, phonolite, trachyte), but basaltic and other compositions are known. Pumice is commonly...

l'Homme and may be the oldest known musical instrument. Lithophone made of Phonolite in the Schellerhau botanic garden (Germany) Ethiopian Lithophones with...

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

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

rocks are overlain and intruded by volcanic rock (basalts, basanites, phonolites and trachytes) of the Tertiary. The eastern third of Franconia is dominated...

Kyle, Philip R.; Smellie, John L. (September 1997). "Petrogenesis of a Phonolite-Trachyte Succession at Mount Sidley, Marie Byrd Land, Antarctica". Journal...