- a dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts.
Origin of felsite
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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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A fine-grained, light-colored igneous rock, consisting mainly of feldspar and quartz.
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