웹2024년 3월 17일 · an igneous, volcanic rock with a high iron content. Basque: dazita Catalan: dacita f Chinese: Mandarin: 英安岩 (yīng'ānyán) Czech: dacit m Danish: dacit Dutch: … 웹dacite, volcanic rock that may be considered a quartz-bearing variety of andesite. Dacite is primarily associated with andesite and trachyte and forms lava flows, dikes, and sometimes …
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Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, … 더 보기 Dacite is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between 더 보기 Dacite usually forms as an intrusive rock such as a dike or sill. Examples of this type of dacite outcrop are found in northwestern Montana and northeastern Bulgaria. Nevertheless, because of the moderately high silica content, dacitic magma is … 더 보기 The word dacite comes from Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains (now modern Romania and Moldova) … 더 보기 In hand specimen, many of the hornblende and biotite dacites are grey or pale brown and yellow rocks with white feldspars, and black crystals of biotite and hornblende. Other dacites, … 더 보기 Dacite is relatively common and occurs in various tectonic and magmatic contexts: • In oceanic volcanic series. Examples: Iceland (Heiðarsporður ridge), Juan de Fuca Ridge 더 보기 • Lassen Volcanic National Park – National park in California, United States • Potosí – City in Bolivia 더 보기 웹2024년 1월 19일 · From Wikimedia Commons, the free media repository. 日本語: デイサイト. dacite. volcanic igneous rock made of quartz and plagioclase phenocrysts and the ground … city council results of election
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웹2024년 2월 27일 · Antrasit ini memiliki ciri-ciri fisik (karakteristik) yang membedakannya dengan jenis batubara lainnya. Berikut ini adalah ciri-ciri Antrasit yang paling utama: Berwarna Hitam Mengkilat: Antrasit secara fisik mudah dibedakan karena warnanya yang hitam mengkilat. Hal ini karena kandungan karbon yang besar di dalam jenis batubara ini. 웹2024년 4월 3일 · Dacit je vulkanska kamnina, ki je sestavljena iz kremena, natrijevih-kalijevih glinencev in obarvanih mineralov, med katerimi prevladuje rogovača. Po kemijski sestavi je nekje med andezitom in riolitom. Kamnina je predorninski ekvivalent … dictionary kimono