Dacite meaning

dā'sīt'
A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene.
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A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene. It is the fine-grained equivalent of granodiorite.
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(geology) An igneous, volcanic rock with a high iron content.
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Origin of dacite

From German Dazit, from Latin Dācia (“greater Romania"). First used in 1863 by Austrian geologists Franz von Hauer and Guido Stache, in a description of the geology of Transylvania.