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

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

The biggest is probably the mountain Oberoderwitzer Spitzberg with his head of Phonolite. On the slopes of the mountain Sonnenhübel, there are the so-called...

Schlaggenwald. Late Tertiary faulting and volcanism gave rise to basalt and phonolite dikes. Ore veins include iron, copper, tin, tungsten, lead, silver, cobalt...

varies from gray to pinkish beige, while the steep roofs are covered with phonolite flagstones, a igneous rock with an almost crystalline sound. The modern...

Selama mountain, with Erica arborea forest, church, and a memorial stone of the 1930s, left by soldiers of the Italian army, a metres-wide phonolite with...

Fencing of homesteads, generally in dry stones Church bells, generally three elongated plates in phonolite or clinkstone, with different tonalities Milling...

The rocks that form Mount Kenya are mainly basalts, rhomb porphyrites, phonolites, kenytes and trachytes. Kenyte was first reported by Gregory in 1900 following...

appears in islands around individual domes. The majority of the basalt and phonolite cones sit directly on the sandstones of the Middle Bunter. Cutting deeply...

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

in Dogu'a Tembien, a metres-wide phonolite with inscriptions. It is located at the top of the Dabba Selama mountain, and was carved by soldiers that participated...

the lower locations, the following geological formations are present: Phonolite plugs Upper basalt Interbedded lacustrine deposits Lower basalt Amba Aradam...

the lower locations, the following geological formations are present: Phonolite plugs Upper basalt Interbedded lacustrine deposits Lower basalt Amba Aradam...

fissural alkali basalt. This cycle continued with the emission of trachytes, phonolites and peralkaline rocks. This period was followed by one of erosion, which...

rocks typically include ijolite, melteigite, teschenite, lamprophyres, phonolite, foyaite, shonkinite, silica undersaturated foid-bearing pyroxenite (essexite)...

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...

rhyolitic pumice that covered over 100 km2 (39 sq mi) of land. Afterwards, phonolite domes were created on the exterior of the caldera. A period of calm lasting...

flows (basalt) and fragmented materials associated with trachyte and phonolite domes, as well as layers of pumice. On the outskirts of the Luguet massif...

years ago. Its peak comprises a nepheline phonolite dome, an intrusion through earlier pyroclastics and phonolite flows, suggesting that the volcanic origins...

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