WebVariolite a structural variety of dense volcanic rock of the basalt or diorite type. This rock is filled throughout with spherules (varioles), ranging in size from that of a millet grain to that of a pea, and has a radially divergent structure. Most often the varioles are composed of feldspar fibers impregnated with glass. Web12 Apr 2024 · Variolite. Nord Ardèche . Pros/col Yves B. Polissage Michel S. Publié par Rollet Christophe à
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WebA spherulite-like radiating aggregate composed of feathery, needle-like crystals of plagioclase and pyroxene that occur in mafic volcanic rocks (typically basalt).Variolites may result from devitrification, but are commonly believed to be formed in subaqueous rocks by quench-induced crystallization (Cas and Wright, 1987, p. 420). WebVariolite definition: any basic igneous rock containing rounded bodies ( varioles ) consisting of radiating... Meaning, pronunciation, translations and examples india today college ranking 2022
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WebPantellerite is a type of volcanic rock, specifically a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite. [1] It is named after Pantelleria, a volcanic island in the Strait of Sicily and the type location for this rock. On Pantelleria the rock is usually found as a vitrophyre containing phenocrysts of ... WebTranslations in context of "variolite" in French-English from Reverso Context: La variolite ou pierre à venin, c'est une pierre qui provient de la vallée de la Durance, très efficace contre les morsures de serpent. WebLes meilleures offres pour MULTIBLITZ Variolite 2000 - flash compact sont sur eBay Comparez les prix et les spécificités des produits neufs et d'occasion Pleins d'articles en livraison gratuite! indiatoday.com live