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 9–14% alkali...

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...

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...

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

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...

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...

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

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

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

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

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

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

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

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

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...

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

Cripple Creek (Battle Mountain) Mines, 1906, red-phonolite dikes, red-basic dikes, yellow-veins...

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

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

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...

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

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

remnant of a laccolith. The igneous material that forms the Tower is a phonolite porphyry intruded about 40.5 million years ago, a light to dark-gray or...

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...

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

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...

and fluid lavas, but they differentiated over time (trachybasalts and phonolites), which gave place to more explosive eruptions. Around 200,000 years ago...