- a dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts.
Origin of felsite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for felsite
The stones themselves were felsite, which abounds in the locality.
In the south of the island there are sills and dykes of felsite, quartz-porphyry, rhyolite, trachyte and pitchstone.
We found, besides, a few cores of felsite and some shapeless flakes and several fragments of large metates.
- any fine-grained igneous rock consisting essentially of quartz and feldspar
C18: fels(par) + -ite 1
- A fine-grained, light-colored igneous rock, consisting mainly of feldspar and quartz.
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