dacite

enUK

da·cite

D0002750 (dā′sīt′)n. A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene.

[After Dacia.]

dacite

(ˈdeɪsaɪt) nan igneous, volcanic rock characteristically light in colour with relatively high silica content

Thesaurus

Noun

dacite - a grey volcanic rock containing plagioclase and quartz and other crystalline mineralsoligoclase, plagioclase - any of a series of triclinic feldspars that form rocksvolcanic rock - extrusive igneous rock solidified near or on the surface of the Earth

Translations

Dacite

enUK

dacite

[′dā‚sīt] (geology) Very fine crystalline or glassy rock of volcanic origin, composed chiefly of sodic plagioclase and free silica with subordinate dark-colored minerals.

Dacite

a magmatic rock that is the effusive equivalent of granodiorite and quartz-diorite. Dacite consists of a finegrained or vitreous basic mass and phenocrysts of plagioclase and quartz, more rarely, of hornblende, biotite, and pyroxene, and sometimes, sanidine. Where albitization processes are widely developed, dacite turns into quartz al-bitophyre. Dacites were ejected by volcanoes in the Paleozoic (in the Urals, for example), Mesozoic, and Cenozoic (in the Caucasus, for example). They are also found among modern lavas on Kamchatka.

dacite

enUK

noun

Words related to dacite

noun a grey volcanic rock containing plagioclase and quartz and other crystalline minerals

Related Words

oligoclase
plagioclase
volcanic rock

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