Felsite meaning

fĕlsīt
A fine-grained, light-colored igneous rock, composed chiefly of feldspar and quartz.
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A light-colored, dense, fine-grained igneous rock consisting mainly of feldspar and quartz.
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A fine-grained, light-colored igneous rock, consisting mainly of feldspar and quartz.
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(mineralogy) A fine grained volcanic extrusive rock, generally light in color, composed of felsic minerals.

The buff-colored dacites of the Superstition Mountains are felsites.

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(geology) Any light-colored volcanic rock whose true mineralogy is not yet determined.
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Origin of felsite

  • fels(par) –ite

    From American Heritage Dictionary of the English Language, 5th Edition