adjective Geology relating to or denoting a group of light-coloured minerals including feldspar, quartz, and muscovite. Often contrasted with mafic.
early 20th cent.: from feldspar + a contr. of silica.

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  • Felsic — is a term used in geology to refer to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. The term combines the words feldspar and silica. Felsic minerals are… …   Wikipedia

  • felsic — 1912, from FELDSPAR (Cf. feldspar) + SILICA (Cf. silica) + ic …   Etymology dictionary

  • felsic rock — Igneous rock dominated by the light coloured, silicon and aluminum rich minerals feldspar and quartz. The presence of these minerals gives felsic rock its characteristic light gray colour. The presence of small amounts of dark minerals rich in… …   Universalium

  • felsic and mafic rocks — ▪ igneous rock       division of igneous rocks (mafic rock) on the basis of their silica content. Chemical analyses of the most abundant components in rocks usually are presented as oxides (oxide) of the elements; igneous rocks typically consist… …   Universalium

  • felsic — /fel sik/, adj. Geol. (of rocks) consisting chiefly of feldspars, feldspathoids, quartz, and other light colored minerals. Cf. mafic. [1910 15; FEL(DSPAR) + S(ILICA) + IC] * * * …   Universalium

  • felsic — adjective Enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Ant: mafic See Also: felsite …   Wiktionary

  • felsic — ALASKA VOLCANO OBSERVATORY GLOSSARY An igneous rock having abundant light colored minerals …   Glossary of volcanic terms

  • felsic — fel·sic …   English syllables

  • felsic — /ˈfɛlsɪk/ (say felsik) adjective 1. of or relating to light coloured rocks containing an abundance of such minerals as felspar, felspathoid and silica. 2. of or relating to the minerals themselves such as quartz, felspars, felspathoids and… …  

  • felsic — ˈfelsik adjective Etymology: feldspar + silica + ic : consisting of or chiefly consisting of feldspar or feldspathoid quartz …   Useful english dictionary

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